How are council websites impacting the planet? You may not think of websites as sources of carbon emissions but they are. Data centres, transmission networks, and the devices we use to access them all use electricity which, in turn, produces carbon emissions. When your website has lots of visitors that can easily add up. We've used the Website Carbon Calculator (created by Wholegrain Digital) to assess UK local authority websites.
The average emissions from a Council homepage are 0.48g (median of 0.32g) which is worse than an average website (0.36g). Overall, Councils are doing badly. See the full list below.
We use the Digital Carbon Rating Scale which rates websites on a scale from to . As the methodology for estimating web page emissions updates over time, the thresholds for these ratings also changes. That is because internet technologies can become more efficient over time and that lowers the impact of similarly sized pages. We show the ratings as they were at a given date.
This is the distribution of ratings across local/combined authorities.
| Rating | Grams CO2e per pageview |
|---|---|
| A+ | ≤ 0.040 |
| A | ≤ 0.079 |
| B | ≤ 0.145 |
| C | ≤ 0.209 |
| D | ≤ 0.278 |
| E | < 0.359 |
| F | ≥ 0.360 |
| Rating | Grams CO2e per pageview |
|---|---|
| A+ | ≤ 0.095 |
| A | ≤ 0.186 |
| B | ≤ 0.341 |
| C | ≤ 0.493 |
| D | ≤ 0.656 |
| E | ≤ 0.846 |
| F | > 0.846 |
Each visitor may only produce a few grams of CO2 emissions but when taken over time - and over the number of visitors - that can soon add up. For instance, if your page generates 1g of CO2 per visit and you get 10,000 visitors a month that works out at as much CO2 as boiling water for 5,700 cups of tea a year.
Aside from the environmental impact of large websites, there is also the impact on your visitors who are on limited data plans. A single visit to a 30MB homepage (12g of CO2) would use an entire day's worth of data for someone on a 1GB monthly plan. Should accessing local government be that much of a burden on the poorest in your community?
Don't despair! The worst offenders usually have some very easy things they can do to dramatically reduce their CO2 emissions that most likely don't need the IT department to get involved.
The first thing to do is check the file sizes of images you use on the front page. Often there will be a large header image, images in a carousel, or images associated with news items. These are most likely added through a content management system which doesn't optimise the image.
Let's find the largest images on a council website. Firstly we'll open our browser's Developer Tools. In Firefox/Chrome/Edge you can usually press F12 to do this (or find it in the browser menu). Once you have Developer Tools open select the "Network" view and then visit the website. As the page loads it should give you a view similar to below.
In this example from March 2021 we have sorted the view by size of file by clicking on the "Size" column heading. We can immediately see that the page totals 32MB with 30.5MB of that due to images. In fact, 22MB comes from just two images! The reason these two are so large is because they have been added in their full, original, resolutions (6571x2850 px and 5392x3595 px) - despite the fact most people's monitors are much narrower than this - and with no optimisation. If we save and open Luther_and_Mayor_1.jpg with the Photos software on Windows we can shrink it to "Large: Best for viewing" which is still a massive 2449x1633 pixels in size. This immediately takes us down to 596kB but we can do better. Using tinyjpg.com (there is also tinypng.com) we can shrink that further to 383kB - 29 times smaller than the original! We could use the same method to shrink the other 11MB image to 322kB. Just optimising those two images would reduce the page size from 32MB to about 10MB. And optimising the other large images would probably get the page down to under 3MB.
When we originally tested the Hambleton District Council website it was producing over 11g of CO2 per visit and was 3rd worst. We suggested that they optimise three of their images - which they did within 5 minutes - and they reduced their carbon emissions to 1.03g of CO2 taking themselves from 3rd to 177th in terms of highest emissions! So some simple, quick, things can make a huge difference.
Images are one area that can be tackled by those who update a website day-to-day. Aside from images, the other common source of emissions is Javascript/CSS. This will most likely require the council Web Team/IT to remove unnecessary or duplicated libraries and is likely a bigger ask. Do large Javascript frameworks need to be included on every page if it could be done in a few lines of vanilla Javascript?
For more tips, Wholegrain Digital have 17 ways you can make your website more efficient and we have a similar blog post from the #PlanetData2 event in 2020.
Here is the full list of councils with their CO2 emissions. Note that council websites often change with new featured items and this can affect their CO2 emissions so this table is a snapshot. Some councils now block us from assessing their websites.
| Rank | Council | ONS Code | CO2 (g) | Rating | MB | Updated | Note |
|---|---|---|---|---|---|---|---|
| 1 | Liverpool City Region | E47000004 | 5.08 | F | 35.2 | 2026-01-06 | |
| 2 | South Staffordshire Council | E07000196 | 3.98 | F | 27.6 | 2026-01-06 | |
| 3 | Tendring District Council | E07000076 | 2.97 | F | 20.6 | 2026-01-06 | |
| 4 | Sevenoaks District Council | E07000111 | 2.62 | F | 18.2 | 2026-01-06 | |
| 5 | Monmouthshire County Council | W06000021 | 2.55 | F | 17.6 | 2026-01-06 | |
| 6 | Colchester Borough Council | E07000071 | 2.12 | F | 14.7 | 2026-01-06 | |
| 7 | Rossendale Borough Council | E07000125 | 2.10 | F | 17.8 | 2026-01-06 | |
| 8 | North Hertfordshire District Council | E07000099 | 2.09 | F | 14.4 | 2026-01-06 | |
| 9 | London Borough of Sutton | E09000029 | 2.04 | F | 14.1 | 2026-01-06 | |
| 10 | Comhairle nan Eilean Siar | S12000013 | 1.92 | F | 13.3 | 2026-01-06 | |
| 11 | Tandridge District Council | E07000215 | 1.75 | F | 12.1 | 2026-01-06 | |
| 11 | Swale Borough Council | E07000113 | 1.75 | F | 12.1 | 2026-01-06 | |
| 13 | London Borough of Harrow | E09000015 | 1.73 | F | 14.7 | 2026-01-06 | |
| 14 | South Derbyshire District Council | E07000039 | 1.58 | F | 10.9 | 2026-01-06 | |
| 15 | Reading Borough Council | E06000038 | 1.55 | F | 10.7 | 2026-01-06 | |
| 16 | Maidstone Borough Council | E07000110 | 1.54 | F | 10.6 | 2026-01-06 | |
| 17 | Sandwell Metropolitan Borough Council | E08000028 | 1.36 | F | 11.5 | 2026-01-06 | |
| 18 | Gloucestershire County Council | E10000013 | 1.35 | F | 9.4 | 2026-01-06 | |
| 19 | Telford & Wrekin Council | E06000020 | 1.24 | F | 8.6 | 2026-01-06 | |
| 19 | Stockton-on-Tees Borough Council | E06000004 | 1.24 | F | 10.5 | 2026-01-06 | |
| 19 | Dartford Borough Council | E07000107 | 1.24 | F | 8.6 | 2026-01-06 | |
| 22 | Dudley Metropolitan Borough Council | E08000027 | 1.20 | F | 4.8 | 2024-12-10 | BLOCKED |
| 23 | Flintshire County Council | W06000005 | 1.17 | F | 8.1 | 2026-01-06 | |
| 24 | Cambridge City Council | E07000008 | 1.12 | F | 9.5 | 2026-01-06 | |
| 25 | Welwyn Hatfield Council | E07000241 | 1.10 | F | 7.6 | 2026-01-06 | |
| 25 | London Borough of Hounslow | E09000018 | 1.10 | F | 9.3 | 2026-01-06 | |
| 27 | North East | E47000010 | 1.08 | F | 4.9 | 2024-11-07 | BLOCKED |
| 28 | Runnymede Borough Council | E07000212 | 1.04 | F | 7.2 | 2026-01-06 | |
| 29 | Tees Valley | E47000006 | 1.03 | F | 8.7 | 2026-01-06 | |
| 30 | Lincolnshire County Council | E10000019 | 1.01 | F | 8.5 | 2026-01-06 | |
| 31 | South Cambridgeshire District Council | E07000012 | 1.00 | F | 8.4 | 2026-01-06 | |
| 32 | West of England | E47000009 | 0.99 | F | 6.9 | 2026-01-06 | |
| 33 | Birmingham City Council | E08000025 | 0.98 | F | 3.9 | 2025-03-05 | BLOCKED |
| 34 | Woking Borough Council | E07000217 | 0.96 | F | 8.2 | 2026-01-06 | |
| 35 | Wealden District Council | E07000065 | 0.95 | F | 6.6 | 2026-01-06 | |
| 35 | Sefton Metropolitan Borough Council | E08000014 | 0.95 | F | 8.0 | 2026-01-06 | |
| 37 | Greater Manchester | E47000001 | 0.93 | F | 6.4 | 2026-01-06 | |
| 37 | Derry City and Strabane | N09000005 | 0.93 | F | 7.9 | 2026-01-06 | |
| 39 | Castle Point Borough Council | E07000069 | 0.92 | F | 6.3 | 2026-01-06 | |
| 39 | Cambridgeshire and Peterborough | E47000008 | 0.92 | F | 6.4 | 2026-01-06 | |
| 41 | North Kesteven District Council | E07000139 | 0.89 | F | 6.2 | 2026-01-06 | |
| 41 | Bromsgrove District Council | E07000234 | 0.89 | F | 6.2 | 2026-01-06 | |
| 43 | North Devon Council | E07000043 | 0.88 | F | 6.1 | 2026-01-06 | |
| 44 | Wakefield Metropolitan District Council | E08000036 | 0.87 | F | 6.0 | 2026-01-06 | |
| 44 | Ribble Valley Borough Council | E07000124 | 0.87 | F | 6.0 | 2026-01-06 | |
| 44 | Chelmsford City Council | E07000070 | 0.87 | F | 4.0 | 2024-10-16 | BLOCKED |
| 47 | Middlesbrough Borough Council | E06000002 | 0.86 | F | 3.9 | 2024-10-16 | BLOCKED |
| 48 | London Borough of Barking and Dagenham | E09000002 | 0.86 | F | 6.0 | 2026-01-06 | |
| 48 | Cardiff Council | W06000015 | 0.86 | F | 3.4 | 2024-10-16 | BLOCKED |
| 50 | North Ayrshire Council | S12000021 | 0.85 | F | 5.9 | 2026-01-06 | |
| 51 | Gloucester City Council | E07000081 | 0.84 | F | 5.8 | 2026-01-06 | |
| 52 | Mid Suffolk District Council | E07000203 | 0.83 | F | 5.8 | 2026-01-06 | |
| 52 | London Borough of Hammersmith & Fulham | E09000013 | 0.83 | E | 3.8 | 2025-03-05 | BLOCKED |
| 54 | West Lindsey District Council | E07000142 | 0.82 | F | 5.7 | 2026-01-06 | |
| 54 | Exeter City Council | E07000041 | 0.82 | E | 3.3 | 2024-10-16 | BLOCKED |
| 56 | Spelthorne Borough Council | E07000213 | 0.81 | F | 5.6 | 2026-01-06 | |
| 57 | St Albans City and District Council | E07000240 | 0.80 | F | 5.6 | 2026-01-06 | |
| 57 | Newcastle-upon-Tyne City Council | E08000021 | 0.80 | E | 3.2 | 2025-06-03 | BLOCKED |
| 59 | East Hertfordshire District Council | E07000242 | 0.79 | F | 5.5 | 2026-01-06 | |
| 60 | Gateshead Metropolitan Borough Council | E08000037 | 0.78 | F | 5.4 | 2026-01-06 | |
| 61 | West Northamptonshire | E06000062 | 0.77 | F | 6.6 | 2026-01-06 | |
| 62 | Tameside Metropolitan Borough Council | E08000008 | 0.76 | E | 3.0 | 2024-10-16 | BLOCKED |
| 63 | South Kesteven District Council | E07000141 | 0.76 | F | 5.3 | 2026-01-06 | |
| 63 | Rutland County Council | E06000017 | 0.76 | F | 5.3 | 2026-01-06 | |
| 63 | Portsmouth City Council | E06000044 | 0.76 | E | 3.5 | 2024-11-07 | BLOCKED |
| 66 | Surrey Heath Borough Council | E07000214 | 0.75 | F | 6.4 | 2026-01-06 | |
| 67 | Test Valley Borough Council | E07000093 | 0.74 | F | 5.1 | 2026-01-06 | |
| 67 | Newcastle-Under-Lyme District Council | E07000195 | 0.74 | F | 5.1 | 2026-01-06 | |
| 69 | Derby City Council | E06000015 | 0.73 | F | 5.0 | 2026-01-06 | |
| 69 | Chorley Council | E07000118 | 0.73 | F | 5.1 | 2026-01-06 | |
| 71 | Suffolk County Council | E10000029 | 0.71 | F | 4.9 | 2026-01-06 | |
| 71 | Guildford Borough Council | E07000209 | 0.71 | F | 4.9 | 2026-01-06 | |
| 71 | Barnsley Metropolitan Borough Council | E08000016 | 0.71 | F | 4.9 | 2026-01-06 | |
| 74 | North East Lincolnshire Council | E06000012 | 0.69 | F | 4.8 | 2026-01-06 | |
| 75 | West Yorkshire Combined Authority | E47000003 | 0.68 | F | 4.7 | 2026-01-06 | |
| 76 | Rochford District Council | E07000075 | 0.67 | F | 4.6 | 2026-01-06 | |
| 76 | Babergh District Council | E07000200 | 0.67 | F | 4.6 | 2026-01-06 | |
| 78 | London Borough of Islington | E09000019 | 0.66 | F | 4.5 | 2026-01-06 | |
| 78 | Bolsover District Council | E07000033 | 0.66 | E | 2.6 | 2024-11-07 | BLOCKED |
| 80 | North of Tyne | E47000011 | 0.65 | D | 2.6 | 2024-11-07 | BLOCKED |
| 81 | North Norfolk District Council | E07000147 | 0.65 | F | 4.5 | 2026-01-06 | |
| 81 | Lancaster City Council | E07000121 | 0.65 | F | 4.5 | 2026-01-06 | |
| 81 | Hart District Council | E07000089 | 0.65 | F | 4.5 | 2026-01-06 | |
| 81 | Coventry City Council | E08000026 | 0.65 | F | 5.5 | 2026-01-06 | |
| 85 | Rugby Borough Council | E07000220 | 0.64 | F | 5.5 | 2026-01-06 | |
| 86 | Redditch Borough Council | E07000236 | 0.63 | F | 4.3 | 2026-01-06 | |
| 87 | South Ribble Borough Council | E07000126 | 0.62 | F | 5.3 | 2026-01-06 | |
| 87 | Lisburn and Castlereagh | N09000007 | 0.62 | F | 4.3 | 2026-01-06 | |
| 87 | Armagh City, Banbridge and Craigavon | N09000002 | 0.62 | F | 4.3 | 2026-01-06 | |
| 90 | Winchester City Council | E07000094 | 0.61 | F | 4.2 | 2026-01-06 | |
| 90 | Stroud District Council | E07000082 | 0.61 | F | 4.2 | 2026-01-06 | |
| 90 | Chesterfield Borough Council | E07000034 | 0.61 | F | 5.2 | 2026-01-06 | |
| 90 | Cheshire West and Chester Council | E06000050 | 0.61 | F | 4.2 | 2026-01-06 | |
| 90 | Breckland District Council | E07000143 | 0.61 | F | 4.2 | 2026-01-06 | |
| 90 | Blaenau Gwent County Borough Council | W06000019 | 0.61 | F | 4.2 | 2025-09-04 | BLOCKED |
| 96 | Tonbridge and Malling Borough Council | E07000115 | 0.60 | D | 2.4 | 2024-10-16 | BLOCKED |
| 97 | Dacorum Council | E07000096 | 0.60 | D | 2.4 | 2024-10-16 | BLOCKED |
| 98 | Calderdale Metropolitan Borough Council | E08000033 | 0.60 | F | 4.1 | 2026-01-06 | |
| 99 | Basingstoke and Deane Borough Council | E07000084 | 0.59 | F | 4.1 | 2026-01-06 | |
| 100 | Sunderland City Council | E08000024 | 0.58 | F | 4.0 | 2026-01-06 | |
| 100 | Southend-on-Sea Borough Council | E06000033 | 0.58 | F | 5.0 | 2026-01-06 | |
| 100 | London Borough of Bexley | E09000004 | 0.58 | F | 4.0 | 2026-01-06 | |
| 100 | Gedling Borough Council | E07000173 | 0.58 | F | 4.0 | 2026-01-06 | |
| 104 | City of Edinburgh Council | S12000036 | 0.57 | F | 4.8 | 2026-01-06 | |
| 105 | Wyre Forest District Council | E07000239 | 0.56 | F | 3.8 | 2026-01-06 | |
| 105 | Central Bedfordshire Council | E06000056 | 0.56 | F | 3.9 | 2026-01-06 | |
| 107 | Tamworth Borough Council | E07000199 | 0.55 | F | 3.8 | 2026-01-06 | |
| 107 | North Lanarkshire Council | S12000044 | 0.55 | F | 3.8 | 2026-01-06 | |
| 107 | East Riding of Yorkshire Council | E06000011 | 0.55 | F | 3.8 | 2026-01-06 | |
| 107 | Blackburn with Darwen Borough Council | E06000008 | 0.55 | D | 2.2 | 2024-10-16 | BLOCKED |
| 111 | Royal Borough of Kingston upon Thames | E09000021 | 0.54 | F | 4.6 | 2026-01-06 | |
| 112 | Tewkesbury Borough Council | E07000083 | 0.53 | F | 3.7 | 2026-01-06 | |
| 112 | Sheffield City Council | E08000019 | 0.53 | F | 3.7 | 2026-01-06 | |
| 112 | London Borough of Newham | E09000025 | 0.53 | F | 4.5 | 2026-01-06 | |
| 112 | Devon County Council | E10000008 | 0.53 | F | 3.7 | 2026-01-06 | |
| 112 | City of Lincoln Council | E07000138 | 0.53 | F | 3.6 | 2026-01-06 | |
| 117 | Mid and East Antrim | N09000008 | 0.52 | F | 3.6 | 2026-01-06 | |
| 117 | Broxtowe Borough Council | E07000172 | 0.52 | F | 3.6 | 2026-01-06 | |
| 119 | Walsall Metropolitan Borough Council | E08000030 | 0.51 | F | 4.3 | 2026-01-06 | |
| 119 | Royal Borough of Kensington and Chelsea | E09000020 | 0.51 | F | 4.3 | 2026-01-06 | |
| 119 | Isle of Wight Council | E06000046 | 0.51 | F | 3.5 | 2026-01-06 | |
| 119 | Isle of Anglesey County Council | W06000001 | 0.51 | F | 3.5 | 2026-01-06 | |
| 119 | Burnley Borough Council | E07000117 | 0.51 | D | 2.0 | 2024-10-16 | BLOCKED |
| 124 | Tunbridge Wells Borough Council | E07000116 | 0.50 | F | 3.4 | 2026-01-06 | |
| 124 | London Borough of Redbridge | E09000026 | 0.50 | F | 3.5 | 2026-01-06 | |
| 124 | Brentwood Borough Council | E07000068 | 0.50 | F | 3.5 | 2026-01-06 | |
| 124 | Aberdeenshire Council | S12000034 | 0.50 | F | 3.4 | 2026-01-06 | |
| 128 | Blackpool Borough Council | E06000009 | 0.49 | F | 3.4 | 2026-01-06 | |
| 128 | Amber Valley Borough Council | E07000032 | 0.49 | F | 3.4 | 2026-01-06 | |
| 130 | Worcestershire County Council | E10000034 | 0.48 | F | 3.3 | 2026-01-06 | |
| 130 | Three Rivers District Council | E07000102 | 0.48 | F | 3.4 | 2026-01-06 | |
| 130 | Rushmoor Borough Council | E07000092 | 0.48 | F | 3.3 | 2026-01-06 | |
| 130 | Hyndburn Borough Council | E07000120 | 0.48 | F | 3.3 | 2026-01-06 | |
| 130 | Folkestone and Hythe | E07000112 | 0.48 | F | 3.3 | 2026-01-06 | |
| 135 | South Tyneside Council | E08000023 | 0.47 | C | 1.9 | 2025-04-23 | BLOCKED |
| 136 | Gravesham Borough Council | E07000109 | 0.46 | F | 3.2 | 2026-01-06 | |
| 136 | Dorset Council | E06000059 | 0.46 | F | 3.2 | 2025-10-14 | BLOCKED |
| 138 | Warwickshire County Council | E10000031 | 0.45 | F | 3.8 | 2026-01-06 | |
| 138 | New Forest District Council | E07000091 | 0.45 | F | 3.1 | 2026-01-06 | |
| 138 | Fermanagh and Omagh | N09000006 | 0.45 | F | 3.1 | 2026-01-06 | |
| 138 | Cheltenham Borough Council | E07000078 | 0.45 | F | 3.8 | 2026-01-06 | |
| 138 | Bradford Metropolitan District Council | E08000032 | 0.45 | C | 1.8 | 2024-11-07 | BLOCKED |
| 138 | Aberdeen City Council | S12000033 | 0.45 | F | 3.8 | 2026-01-06 | |
| 144 | Watford Borough Council | E07000103 | 0.44 | F | 3.7 | 2026-01-06 | |
| 144 | Trafford Metropolitan Borough Council | E08000009 | 0.44 | C | 1.8 | 2024-10-16 | BLOCKED |
| 144 | Reigate & Banstead Borough Council | E07000211 | 0.44 | F | 3.0 | 2026-01-06 | |
| 144 | Milton Keynes | E06000042 | 0.44 | F | 3.1 | 2026-01-06 | |
| 144 | Manchester City Council | E08000003 | 0.44 | F | 3.0 | 2026-01-06 | |
| 144 | Hartlepool Borough Council | E06000001 | 0.44 | F | 3.0 | 2026-01-06 | |
| 150 | Wolverhampton City Council | E08000031 | 0.43 | F | 3.0 | 2025-11-19 | BLOCKED |
| 151 | London Borough of Havering | E09000016 | 0.43 | F | 3.6 | 2026-01-06 | |
| 152 | Somerset County Council | E10000027 | 0.41 | F | 3.4 | 2026-01-06 | |
| 152 | Somerset Council | E06000066 | 0.41 | F | 3.4 | 2026-01-06 | |
| 152 | Mid Ulster | N09000009 | 0.41 | F | 2.8 | 2026-01-06 | |
| 152 | Dundee City Council | S12000042 | 0.41 | F | 2.8 | 2026-01-06 | |
| 152 | Charnwood Borough Council | E07000130 | 0.41 | F | 3.5 | 2026-01-06 | |
| 157 | Torfaen County Borough Council | W06000020 | 0.40 | F | 2.8 | 2026-01-06 | |
| 157 | Thanet District Council | E07000114 | 0.40 | F | 2.8 | 2026-01-06 | |
| 157 | Teignbridge District Council | E07000045 | 0.40 | C | 1.6 | 2024-12-10 | BLOCKED |
| 157 | Redcar and Cleveland Council | E06000003 | 0.40 | F | 2.8 | 2026-01-06 | |
| 157 | Peterborough City Council | E06000031 | 0.40 | F | 2.8 | 2026-01-06 | |
| 157 | Perth and Kinross Council | S12000024 | 0.40 | F | 2.8 | 2026-01-06 | |
| 163 | Neath Port Talbot County Borough Council | W06000012 | 0.39 | F | 2.7 | 2026-01-06 | |
| 163 | London Borough of Camden | E09000007 | 0.39 | F | 2.7 | 2026-01-06 | |
| 163 | Knowsley Metropolitan Borough Council | E08000011 | 0.39 | F | 2.7 | 2026-01-06 | |
| 163 | Hertfordshire County Council | E06000019 | 0.39 | F | 2.7 | 2026-01-06 | |
| 167 | Stevenage Borough Council | E07000243 | 0.38 | F | 2.6 | 2026-01-06 | |
| 167 | Malvern Hills District Council | E07000235 | 0.38 | C | 1.5 | 2025-08-07 | BLOCKED |
| 167 | London Borough of Brent | E09000005 | 0.38 | F | 2.7 | 2026-01-06 | |
| 167 | East Suffolk Council | E07000244 | 0.38 | F | 2.7 | 2026-01-06 | |
| 167 | East Cambridgeshire District Council | E07000009 | 0.38 | F | 3.2 | 2026-01-06 | |
| 167 | Antrim and Newtownabbey | N09000001 | 0.38 | F | 2.6 | 2026-01-06 | |
| 173 | Wrexham County Borough Council | W06000006 | 0.37 | F | 2.5 | 2026-01-06 | |
| 173 | Fife Council | S12000015 | 0.37 | F | 2.5 | 2026-01-06 | |
| 173 | Caerphilly County Borough Council | W06000018 | 0.37 | C | 1.5 | 2024-10-16 | BLOCKED |
| 173 | Bristol City Council | E06000023 | 0.37 | F | 2.6 | 2026-01-06 | |
| 173 | Bolton Metropolitan Borough Council | E08000001 | 0.37 | F | 3.1 | 2026-01-06 | |
| 178 | Slough Borough Council | E06000039 | 0.36 | F | 2.5 | 2026-01-06 | |
| 178 | London Borough of Croydon | E09000008 | 0.36 | F | 2.5 | 2026-01-06 | |
| 178 | Blaby District Council | E07000129 | 0.36 | F | 2.5 | 2026-01-06 | |
| 181 | St Helens Metropolitan Borough Council | E08000013 | 0.35 | E | 2.4 | 2026-01-06 | |
| 181 | Powys County Council | W06000023 | 0.35 | E | 2.4 | 2026-01-06 | |
| 181 | North Northamptonshire | E06000061 | 0.35 | E | 2.9 | 2026-01-06 | |
| 181 | London Borough of Southwark | E09000028 | 0.35 | E | 3.0 | 2026-01-06 | |
| 181 | London Borough of Haringey | E09000014 | 0.35 | E | 3.0 | 2026-01-06 | |
| 181 | Kingston-upon-Hull City Council | E06000010 | 0.35 | E | 2.4 | 2026-01-06 | |
| 181 | Argyll and Bute Council | S12000035 | 0.35 | E | 2.4 | 2026-01-06 | |
| 188 | Westmorland and Furness | E06000064 | 0.34 | E | 2.3 | 2026-01-06 | |
| 188 | West Sussex County Council | E10000032 | 0.34 | E | 2.4 | 2026-01-06 | |
| 188 | Lewes District Council | E07000063 | 0.34 | E | 2.3 | 2026-01-06 | |
| 188 | Eastbourne Borough Council | E07000061 | 0.34 | E | 2.3 | 2026-01-06 | |
| 188 | Cannock Chase District Council | E07000192 | 0.34 | E | 2.3 | 2026-01-06 | |
| 193 | Staffordshire County Council | E10000028 | 0.33 | E | 2.3 | 2026-01-06 | |
| 193 | Oxfordshire County Council | E10000025 | 0.33 | E | 2.3 | 2026-01-06 | |
| 193 | Basildon Borough Council | E07000066 | 0.33 | E | 2.3 | 2026-01-06 | |
| 196 | Stratford-on-Avon District Council | E07000221 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | Merthyr Tydfil County Borough Council | W06000024 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | London Borough of Enfield | E09000010 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | Lichfield District Council | E07000194 | 0.32 | E | 2.7 | 2026-01-06 | |
| 196 | King's Lynn and West Norfolk Borough Council | E07000146 | 0.32 | E | 2.7 | 2026-01-06 | |
| 196 | Inverclyde Council | S12000018 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | Falkirk Council | S12000014 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | East Lindsey District Council | E07000137 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | East Devon District Council | E07000040 | 0.32 | B | 1.3 | 2024-12-10 | BLOCKED |
| 196 | Belfast | N09000003 | 0.32 | E | 2.2 | 2026-01-06 | |
| 196 | Ashford Borough Council | E07000105 | 0.32 | E | 2.2 | 2026-01-06 | |
| 207 | West Midlands | E47000007 | 0.31 | E | 2.2 | 2026-01-06 | |
| 207 | West Devon Borough Council | E07000047 | 0.31 | E | 2.2 | 2025-10-15 | BLOCKED |
| 207 | West Berkshire Council | E06000037 | 0.31 | E | 2.2 | 2026-01-06 | |
| 207 | Rhondda Cynon Taf County Borough Council | W06000016 | 0.31 | E | 2.2 | 2026-01-06 | |
| 207 | Oxford City Council | E07000178 | 0.31 | E | 2.2 | 2026-01-06 | |
| 207 | North Lincolnshire Council | E06000013 | 0.31 | E | 2.2 | 2026-01-06 | |
| 207 | Fareham Borough Council | E07000087 | 0.31 | E | 2.1 | 2026-01-06 | |
| 207 | East Lothian Council | S12000010 | 0.31 | E | 2.6 | 2026-01-06 | |
| 207 | East Hampshire District Council | E07000085 | 0.31 | E | 2.2 | 2026-01-06 | |
| 216 | West Oxfordshire District Council | E07000181 | 0.30 | E | 2.1 | 2026-01-06 | |
| 216 | Newry, Mourne and Down | N09000010 | 0.30 | E | 2.6 | 2026-01-06 | |
| 216 | Melton Borough Council | E07000133 | 0.30 | E | 2.6 | 2026-01-06 | |
| 216 | Ards and North Down | N09000011 | 0.30 | E | 2.1 | 2026-01-06 | |
| 220 | Wychavon District Council | E07000238 | 0.29 | B | 1.2 | 2025-08-07 | BLOCKED |
| 221 | Warwick District Council | E07000222 | 0.29 | E | 2.0 | 2026-01-06 | |
| 221 | Swindon Borough Council | E06000030 | 0.29 | E | 2.0 | 2026-01-06 | |
| 221 | Stockport Metropolitan Borough Council | E08000007 | 0.29 | B | 1.1 | 2024-11-07 | BLOCKED |
| 221 | South Lanarkshire Council | S12000029 | 0.29 | E | 2.0 | 2026-01-06 | |
| 221 | London Borough of Tower Hamlets | E09000030 | 0.29 | E | 2.0 | 2026-01-06 | |
| 221 | Huntingdonshire District Council | E07000011 | 0.29 | E | 2.0 | 2026-01-06 | |
| 221 | Hampshire County Council | E10000014 | 0.29 | E | 2.0 | 2026-01-06 | |
| 221 | Bath and North East Somerset Council | E06000022 | 0.29 | E | 2.0 | 2026-01-06 | |
| 229 | Wirral Council | E08000015 | 0.28 | E | 2.4 | 2026-01-06 | |
| 229 | South Holland District Council | E07000140 | 0.28 | E | 2.0 | 2026-01-06 | |
| 229 | London Borough of Lewisham | E09000023 | 0.28 | E | 1.9 | 2026-01-06 | |
| 229 | Great Yarmouth Borough Council | E07000145 | 0.28 | E | 1.9 | 2025-10-14 | BLOCKED |
| 229 | Fylde Borough Council | E07000119 | 0.28 | E | 1.9 | 2026-01-06 | |
| 234 | South Hams District Council | E07000044 | 0.27 | D | 1.9 | 2025-10-14 | BLOCKED |
| 235 | Shetland Islands Council | S12000027 | 0.27 | D | 1.9 | 2026-01-06 | |
| 235 | Moray Council | S12000020 | 0.27 | D | 1.8 | 2026-01-06 | |
| 235 | Havant Borough Council | E07000090 | 0.27 | D | 1.9 | 2026-01-06 | |
| 235 | Causeway Coast and Glens | N09000004 | 0.27 | D | 1.8 | 2026-01-06 | |
| 235 | Arun District Council | E07000224 | 0.27 | D | 1.9 | 2026-01-06 | |
| 240 | Warrington Borough Council | E06000007 | 0.26 | D | 2.2 | 2026-01-06 | |
| 240 | South Yorkshire Mayoral Combined Authority | E47000002 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | South Norfolk District Council | E07000149 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | South Gloucestershire Council | E06000025 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | Rushcliffe Borough Council | E07000176 | 0.26 | D | 2.2 | 2026-01-06 | |
| 240 | Rochdale Metropolitan Borough Council | E08000005 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | Orkney Islands Council | S12000023 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | Oadby and Wigston District Council | E07000135 | 0.26 | D | 2.2 | 2026-01-06 | |
| 240 | London Borough of Hillingdon | E09000017 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | London Borough of Hackney | E09000012 | 0.26 | D | 2.2 | 2026-01-06 | |
| 240 | London Borough of Bromley | E09000006 | 0.26 | D | 2.2 | 2026-01-06 | |
| 240 | Kirklees Council | E08000034 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | Erewash Borough Council | E07000036 | 0.26 | D | 1.8 | 2026-01-06 | |
| 240 | Cornwall Council | E06000052 | 0.26 | D | 2.2 | 2026-01-06 | |
| 240 | Broadland District Council | E07000144 | 0.26 | D | 1.8 | 2026-01-06 | |
| 255 | Stoke-on-Trent City Council | E06000021 | 0.25 | D | 1.7 | 2026-01-06 | |
| 255 | Leicestershire County Council | E10000018 | 0.25 | D | 2.1 | 2026-01-06 | |
| 255 | Halton Borough Council | E06000006 | 0.25 | D | 1.8 | 2026-01-06 | |
| 258 | Rother District Council | E07000064 | 0.24 | D | 1.7 | 2026-01-06 | |
| 258 | Newport City Council | W06000022 | 0.24 | B | 1.0 | 2025-06-03 | BLOCKED |
| 258 | Medway Council | E06000035 | 0.24 | D | 2.0 | 2026-01-06 | |
| 258 | London Borough of Waltham Forest | E09000031 | 0.24 | D | 2.1 | 2026-01-06 | |
| 258 | London Borough of Ealing | E09000009 | 0.24 | D | 1.7 | 2026-01-06 | |
| 258 | Epping Forest District Council | E07000072 | 0.24 | D | 1.7 | 2026-01-06 | |
| 258 | Durham County Council | E06000047 | 0.24 | D | 1.6 | 2026-01-06 | |
| 258 | Cotswold District Council | E07000079 | 0.24 | D | 2.0 | 2026-01-06 | |
| 266 | Waverley Borough Council | E07000216 | 0.23 | D | 1.6 | 2026-01-06 | |
| 266 | Solihull Metropolitan Borough Council | E08000029 | 0.23 | D | 1.6 | 2026-01-06 | |
| 266 | Rotherham Metropolitan Borough Council | E08000018 | 0.23 | D | 2.0 | 2026-01-06 | |
| 266 | North Yorkshire Council | E06000065 | 0.23 | D | 1.9 | 2026-01-06 | |
| 266 | Norfolk County Council | E10000020 | 0.23 | D | 1.6 | 2026-01-06 | |
| 266 | Maldon District Council | E07000074 | 0.23 | D | 1.6 | 2026-01-06 | |
| 266 | Forest of Dean District Council | E07000080 | 0.23 | D | 2.0 | 2026-01-06 | |
| 266 | Dumfries and Galloway Council | S12000006 | 0.23 | B | 0.9 | 2025-04-23 | BLOCKED |
| 266 | Derbyshire Dales District Council | E07000035 | 0.23 | B | 0.9 | 2024-11-07 | BLOCKED |
| 266 | Ashfield District Council | E07000170 | 0.23 | D | 1.6 | 2026-01-06 | |
| 276 | Wigan Metropolitan Borough Council | E08000010 | 0.22 | D | 1.5 | 2026-01-06 | |
| 276 | Westminster City Council | E09000033 | 0.22 | D | 1.8 | 2026-01-06 | |
| 276 | Vale of White Horse District Council | E07000180 | 0.22 | D | 1.5 | 2026-01-06 | |
| 276 | Oldham Metropolitan Borough Council | E08000004 | 0.22 | D | 1.6 | 2026-01-06 | |
| 276 | North West Leicestershire District Council | E07000134 | 0.22 | D | 1.8 | 2026-01-06 | |
| 276 | North Somerset Council | E06000024 | 0.22 | D | 1.5 | 2026-01-06 | |
| 276 | London Borough of Richmond upon Thames | E09000027 | 0.22 | D | 1.8 | 2026-01-06 | |
| 276 | Eastleigh Borough Council | E07000086 | 0.22 | B | 0.9 | 2025-04-23 | BLOCKED |
| 276 | Cherwell District Council | E07000177 | 0.22 | D | 1.6 | 2026-01-06 | |
| 285 | West Dunbartonshire Council | S12000039 | 0.21 | B | 0.8 | 2024-10-16 | BLOCKED |
| 286 | North Tyneside Metropolitan Borough Council | E08000022 | 0.21 | D | 1.5 | 2026-01-06 | |
| 286 | Liverpool City Council | E08000012 | 0.21 | D | 1.4 | 2026-01-06 | |
| 286 | Horsham District Council | E07000227 | 0.21 | D | 1.5 | 2026-01-06 | |
| 286 | Elmbridge Borough Council | E07000207 | 0.21 | D | 1.5 | 2026-01-06 | |
| 286 | East Renfrewshire Council | S12000011 | 0.21 | D | 1.4 | 2026-01-06 | |
| 286 | Cambridgeshire County Council | E10000003 | 0.21 | D | 1.5 | 2026-01-06 | |
| 286 | Bridgend County Borough Council | W06000013 | 0.21 | D | 1.5 | 2026-01-06 | |
| 286 | Boston Borough Council | E07000136 | 0.21 | D | 1.5 | 2026-01-06 | |
| 294 | Stafford Borough Council | E07000197 | 0.20 | C | 1.4 | 2026-01-06 | |
| 294 | South Ayrshire Council | S12000028 | 0.20 | C | 1.4 | 2026-01-06 | |
| 294 | Salford City Council | E08000006 | 0.20 | B | 0.8 | 2024-10-16 | BLOCKED |
| 294 | Renfrewshire Council | S12000038 | 0.20 | C | 1.4 | 2026-01-06 | |
| 294 | Mole Valley District Council | E07000210 | 0.20 | C | 1.7 | 2026-01-06 | |
| 294 | Hastings Borough Council | E07000062 | 0.20 | C | 1.4 | 2026-01-06 | |
| 294 | Doncaster Metropolitan Borough Council | E08000017 | 0.20 | C | 1.4 | 2026-01-06 | |
| 294 | Chichester District Council | E07000225 | 0.20 | C | 1.4 | 2026-01-06 | |
| 294 | Angus Council | S12000041 | 0.20 | C | 1.7 | 2026-01-06 | |
| 303 | West Lancashire Borough Council | E07000127 | 0.19 | C | 1.3 | 2026-01-06 | |
| 303 | Uttlesford District Council | E07000077 | 0.19 | C | 1.3 | 2026-01-06 | |
| 303 | Torridge District Council | E07000046 | 0.19 | C | 1.3 | 2026-01-06 | |
| 303 | Newark and Sherwood District Council | E07000175 | 0.19 | C | 1.6 | 2026-01-06 | |
| 303 | Ipswich Borough Council | E07000202 | 0.19 | C | 1.6 | 2026-01-06 | |
| 303 | High Peak Borough Council | E07000037 | 0.19 | C | 1.3 | 2026-01-06 | |
| 303 | Hertsmere Borough Council | E07000098 | 0.19 | C | 1.3 | 2026-01-06 | |
| 303 | Harborough District Council | E07000131 | 0.19 | C | 1.3 | 2026-01-06 | |
| 303 | Bedford Borough Council | E06000055 | 0.19 | C | 1.3 | 2026-01-06 | |
| 312 | Wiltshire Council | E06000054 | 0.18 | C | 1.2 | 2026-01-06 | |
| 312 | Southampton City Council | E06000045 | 0.18 | C | 1.2 | 2026-01-06 | |
| 312 | Nottinghamshire County Council | E10000024 | 0.18 | C | 1.3 | 2026-01-06 | |
| 312 | Nottingham City Council | E06000018 | 0.18 | C | 1.5 | 2026-01-06 | |
| 312 | Northumberland Council | E06000057 | 0.18 | C | 1.3 | 2026-01-06 | |
| 312 | North Warwickshire Borough Council | E07000218 | 0.18 | C | 1.2 | 2026-01-06 | |
| 312 | London Borough of Lambeth | E09000022 | 0.18 | C | 1.2 | 2026-01-06 | |
| 312 | City of London | E09000001 | 0.18 | C | 1.5 | 2026-01-06 | |
| 312 | Carmarthenshire County Council | W06000010 | 0.18 | C | 1.2 | 2026-01-06 | |
| 321 | West Lothian Council | S12000040 | 0.17 | C | 1.2 | 2026-01-06 | |
| 321 | Pendle Borough Council | E07000122 | 0.17 | C | 1.2 | 2026-01-06 | |
| 321 | Hinckley and Bosworth Borough Council | E07000132 | 0.17 | C | 1.5 | 2026-01-06 | |
| 321 | Gosport Borough Council | E07000088 | 0.17 | C | 1.2 | 2026-01-06 | |
| 321 | East Staffordshire Borough Council | E07000193 | 0.17 | A | 0.7 | 2025-01-07 | BLOCKED |
| 321 | East Ayrshire Council | S12000008 | 0.17 | C | 1.2 | 2026-01-06 | |
| 321 | Darlington Borough Council | E06000005 | 0.17 | C | 1.4 | 2026-01-06 | |
| 321 | City of York Council | E06000014 | 0.17 | C | 1.5 | 2026-01-06 | |
| 321 | Cheshire East Council (Unitary) | E06000049 | 0.17 | C | 1.2 | 2026-01-06 | |
| 321 | Ceredigion County Council | W06000008 | 0.17 | C | 1.2 | 2026-01-06 | |
| 321 | Braintree District Council | E07000067 | 0.17 | C | 1.4 | 2026-01-06 | |
| 321 | Borough of Broxbourne | E07000095 | 0.17 | C | 1.2 | 2026-01-06 | |
| 333 | Royal Borough of Windsor and Maidenhead | E06000040 | 0.16 | C | 1.1 | 2026-01-06 | |
| 333 | Preston City Council | E07000123 | 0.16 | C | 1.1 | 2026-01-06 | |
| 333 | Plymouth City Council | E06000026 | 0.16 | C | 1.1 | 2026-01-06 | |
| 333 | Mid Sussex District Council | E07000228 | 0.16 | C | 1.4 | 2026-01-06 | |
| 333 | Harlow Council | E07000073 | 0.16 | C | 1.4 | 2026-01-06 | |
| 338 | Wokingham Borough Council | E06000041 | 0.15 | C | 1.0 | 2026-01-06 | |
| 338 | Nuneaton and Bedworth Borough Council | E07000219 | 0.15 | C | 1.1 | 2026-01-06 | |
| 338 | London Borough of Wandsworth | E09000032 | 0.15 | C | 1.0 | 2026-01-06 | |
| 338 | London Borough of Merton | E09000024 | 0.15 | C | 1.0 | 2026-01-06 | |
| 338 | Leicester City Council | E06000016 | 0.15 | C | 1.0 | 2026-01-06 | |
| 338 | Derbyshire County Council | E10000007 | 0.15 | C | 1.1 | 2026-01-06 | |
| 338 | Conwy County Borough Council | W06000003 | 0.15 | C | 1.0 | 2026-01-06 | |
| 338 | Bassetlaw District Council | E07000171 | 0.15 | C | 1.1 | 2026-01-06 | |
| 346 | West Suffolk | E07000245 | 0.14 | B | 1.0 | 2026-01-06 | |
| 346 | Surrey County Council | E10000030 | 0.14 | B | 1.0 | 2026-01-06 | |
| 346 | South Oxfordshire District Council | E07000179 | 0.14 | B | 1.0 | 2026-01-06 | |
| 346 | Leeds City Council | E08000035 | 0.14 | B | 1.0 | 2026-01-06 | |
| 346 | Lancashire County Council | E10000017 | 0.14 | B | 0.9 | 2026-01-06 | |
| 351 | Staffordshire Moorlands District Council | E07000198 | 0.13 | B | 0.9 | 2026-01-06 | |
| 351 | London Borough of Barnet | E09000003 | 0.13 | B | 0.9 | 2026-01-06 | |
| 351 | Isles of Scilly | E06000053 | 0.13 | B | 0.9 | 2026-01-06 | |
| 351 | Highland Council | S12000017 | 0.13 | B | 1.1 | 2026-01-06 | |
| 351 | Fenland District Council | E07000010 | 0.13 | B | 0.9 | 2026-01-06 | |
| 351 | East Dunbartonshire Council | S12000045 | 0.13 | B | 1.1 | 2026-01-06 | |
| 351 | Dover District Council | E07000108 | 0.13 | B | 0.9 | 2026-01-06 | |
| 358 | Wyre Council | E07000128 | 0.12 | B | 0.8 | 2026-01-06 | |
| 358 | Pembrokeshire County Council | W06000009 | 0.12 | B | 0.8 | 2026-01-06 | |
| 358 | Epsom and Ewell Borough Council | E07000208 | 0.12 | B | 1.0 | 2026-01-06 | |
| 358 | Bracknell Forest Council | E06000036 | 0.12 | B | 0.8 | 2026-01-06 | |
| 362 | Thurrock Council | E06000034 | 0.11 | B | 0.9 | 2026-01-06 | |
| 362 | Swansea City and Borough Council | W06000011 | 0.11 | B | 0.7 | 2026-01-06 | |
| 362 | Norwich City Council | E07000148 | 0.11 | B | 0.7 | 2026-01-06 | |
| 362 | North East Derbyshire District Council | E07000038 | 0.11 | A | 0.5 | 2024-10-16 | BLOCKED |
| 362 | Cumberland | E06000063 | 0.11 | B | 0.8 | 2026-01-06 | |
| 362 | Bournemouth, Christchurch and Poole | E06000058 | 0.11 | B | 0.8 | 2026-01-06 | |
| 368 | East Sussex County Council | E10000011 | 0.10 | B | 0.7 | 2026-01-06 | |
| 368 | Bury Metropolitan Borough Council | E08000002 | 0.10 | B | 0.7 | 2026-01-06 | |
| 370 | Midlothian Council | S12000019 | 0.09 | B | 0.7 | 2026-01-06 | |
| 370 | Gwynedd County Council | W06000002 | 0.09 | B | 0.6 | 2026-01-06 | |
| 370 | Glasgow City Council | S12000046 | 0.09 | B | 0.7 | 2026-01-06 | |
| 370 | Buckinghamshire | E06000060 | 0.09 | B | 0.8 | 2026-01-06 | |
| 370 | Adur and Worthing Borough Council | E07000223 | 0.09 | B | 0.8 | 2026-01-06 | |
| 375 | Stirling Council | S12000030 | 0.08 | B | 0.5 | 2025-10-14 | BLOCKED |
| 376 | Scottish Borders Council | S12000026 | 0.08 | B | 0.7 | 2026-01-06 | |
| 376 | Essex County Council | E10000012 | 0.08 | B | 0.5 | 2026-01-06 | |
| 376 | Crawley Borough Council | E07000226 | 0.08 | B | 0.6 | 2026-01-06 | |
| 376 | Canterbury City Council | E07000106 | 0.08 | B | 0.7 | 2026-01-06 | |
| 380 | Worcester City Council | E07000237 | 0.07 | A | 0.5 | 2026-01-06 | |
| 380 | Vale of Glamorgan Council | W06000014 | 0.07 | A | 0.5 | 2026-01-06 | |
| 380 | Mid Devon District Council | E07000042 | 0.07 | A | 0.5 | 2026-01-06 | |
| 380 | Mansfield District Council | E07000174 | 0.07 | A | 0.5 | 2026-01-06 | |
| 380 | Luton Borough Council | E06000032 | 0.07 | A | 0.6 | 2026-01-06 | |
| 380 | Denbighshire County Council | W06000004 | 0.07 | A | 0.5 | 2026-01-06 | |
| 380 | Clackmannanshire Council | S12000005 | 0.07 | A | 0.6 | 2026-01-06 | |
| 387 | Shropshire Council - Unitary | E06000051 | 0.06 | A | 0.4 | 2026-01-06 | |
| 387 | Royal Borough of Greenwich | E09000011 | 0.06 | A | 0.5 | 2026-01-06 | |
| 389 | Brighton and Hove City Council | E06000043 | 0.05 | A | 0.4 | 2026-01-06 | |
| 390 | Torbay Council | E06000027 | 0.04 | A+ | 0.3 | 2026-01-06 | |
| 390 | Kent County Council | E10000016 | 0.04 | A+ | 0.3 | 2026-01-06 |
Where the CO2 emissions are given as "?" no result could be found using the Website Carbon Calculator. You can also get this as a CSV file or all the data as JSON.
