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 0.46g (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 | 5.76 | F | 39.8 | 2025-11-19 | |
| 2 | South Staffordshire Council | E07000196 | 3.77 | F | 26.1 | 2025-11-19 | |
| 3 | Tendring District Council | E07000076 | 2.68 | F | 18.5 | 2025-11-19 | |
| 4 | London Borough of Sutton | E09000029 | 2.61 | F | 18.1 | 2025-11-19 | |
| 5 | Maidstone Borough Council | E07000110 | 2.45 | F | 16.9 | 2025-11-19 | |
| 6 | Lisburn and Castlereagh | N09000007 | 2.14 | F | 14.8 | 2025-11-19 | |
| 7 | Swale Borough Council | E07000113 | 2.08 | F | 14.4 | 2025-11-19 | |
| 7 | North Hertfordshire District Council | E07000099 | 2.08 | F | 14.4 | 2025-11-19 | |
| 9 | London Borough of Southwark | E09000028 | 1.92 | F | 16.3 | 2025-11-19 | |
| 10 | Tandridge District Council | E07000215 | 1.80 | F | 12.5 | 2025-11-19 | |
| 11 | Reading Borough Council | E06000038 | 1.49 | F | 10.3 | 2025-11-19 | |
| 12 | Dartford Borough Council | E07000107 | 1.37 | F | 9.5 | 2025-11-19 | |
| 13 | Gloucestershire County Council | E10000013 | 1.30 | F | 9.0 | 2025-11-19 | |
| 14 | Dudley Metropolitan Borough Council | E08000027 | 1.20 | F | 4.8 | 2024-12-10 | BLOCKED |
| 15 | Wealden District Council | E07000065 | 1.18 | F | 8.2 | 2025-11-19 | |
| 16 | Ribble Valley Borough Council | E07000124 | 1.17 | F | 8.1 | 2025-11-19 | |
| 17 | Sandwell Metropolitan Borough Council | E08000028 | 1.16 | F | 9.9 | 2025-11-19 | |
| 18 | Monmouthshire County Council | W06000021 | 1.14 | F | 7.9 | 2025-11-19 | |
| 18 | Flintshire County Council | W06000005 | 1.14 | F | 7.9 | 2025-11-19 | |
| 20 | North East | E47000010 | 1.08 | F | 4.9 | 2024-11-07 | BLOCKED |
| 21 | North Devon Council | E07000043 | 1.06 | F | 7.4 | 2025-11-19 | |
| 22 | Tewkesbury Borough Council | E07000083 | 1.05 | F | 7.3 | 2025-11-19 | |
| 22 | Tees Valley | E47000006 | 1.05 | F | 8.9 | 2025-11-19 | |
| 24 | Comhairle nan Eilean Siar | S12000013 | 1.01 | F | 7.0 | 2025-11-19 | |
| 25 | Woking Borough Council | E07000217 | 0.99 | F | 8.4 | 2025-11-19 | |
| 26 | Birmingham City Council | E08000025 | 0.98 | F | 3.9 | 2025-03-05 | BLOCKED |
| 27 | Welwyn Hatfield Council | E07000241 | 0.94 | F | 6.5 | 2025-11-19 | |
| 27 | London Borough of Harrow | E09000015 | 0.94 | F | 7.9 | 2025-11-19 | |
| 29 | West of England | E47000009 | 0.93 | F | 6.4 | 2025-11-19 | |
| 30 | Cambridge City Council | E07000008 | 0.92 | F | 7.8 | 2025-11-19 | |
| 31 | Rossendale Borough Council | E07000125 | 0.91 | F | 7.7 | 2025-11-19 | |
| 31 | Derby City Council | E06000015 | 0.91 | F | 6.3 | 2025-11-19 | |
| 33 | Derry City and Strabane | N09000005 | 0.90 | F | 7.6 | 2025-11-19 | |
| 34 | North Kesteven District Council | E07000139 | 0.89 | F | 6.1 | 2025-11-19 | |
| 35 | Greater Manchester | E47000001 | 0.87 | F | 6.0 | 2025-11-19 | |
| 35 | Chelmsford City Council | E07000070 | 0.87 | F | 4.0 | 2024-10-16 | BLOCKED |
| 37 | Middlesbrough Borough Council | E06000002 | 0.86 | F | 3.9 | 2024-10-16 | BLOCKED |
| 38 | Cardiff Council | W06000015 | 0.86 | F | 3.4 | 2024-10-16 | BLOCKED |
| 39 | Bromsgrove District Council | E07000234 | 0.86 | F | 6.0 | 2025-11-19 | |
| 40 | London Borough of Barking and Dagenham | E09000002 | 0.85 | F | 5.9 | 2025-11-19 | |
| 40 | Lincolnshire County Council | E10000019 | 0.85 | F | 7.2 | 2025-11-19 | |
| 42 | West Lindsey District Council | E07000142 | 0.84 | F | 5.8 | 2025-11-19 | |
| 42 | Stockton-on-Tees Borough Council | E06000004 | 0.84 | F | 7.1 | 2025-11-19 | |
| 42 | St Albans City and District Council | E07000240 | 0.84 | F | 5.8 | 2025-11-19 | |
| 42 | Southend-on-Sea Borough Council | E06000033 | 0.84 | F | 7.1 | 2025-11-19 | |
| 42 | Cambridgeshire and Peterborough | E47000008 | 0.84 | F | 5.8 | 2025-11-19 | |
| 47 | Wakefield Metropolitan District Council | E08000036 | 0.83 | F | 5.7 | 2025-11-19 | |
| 47 | London Borough of Hammersmith & Fulham | E09000013 | 0.83 | E | 3.8 | 2025-03-05 | BLOCKED |
| 47 | East Hertfordshire District Council | E07000242 | 0.83 | F | 5.8 | 2025-11-19 | |
| 47 | Colchester Borough Council | E07000071 | 0.83 | F | 5.7 | 2025-11-19 | |
| 51 | Runnymede Borough Council | E07000212 | 0.82 | F | 5.6 | 2025-11-19 | |
| 51 | Exeter City Council | E07000041 | 0.82 | E | 3.3 | 2024-10-16 | BLOCKED |
| 53 | South Derbyshire District Council | E07000039 | 0.81 | F | 5.6 | 2025-11-19 | |
| 54 | Newcastle-upon-Tyne City Council | E08000021 | 0.80 | E | 3.2 | 2025-06-03 | BLOCKED |
| 55 | Hartlepool Borough Council | E06000001 | 0.80 | F | 5.6 | 2025-11-19 | |
| 56 | Surrey Heath Borough Council | E07000214 | 0.77 | F | 6.5 | 2025-11-19 | |
| 57 | Tameside Metropolitan Borough Council | E08000008 | 0.76 | E | 3.0 | 2024-10-16 | BLOCKED |
| 58 | Portsmouth City Council | E06000044 | 0.76 | E | 3.5 | 2024-11-07 | BLOCKED |
| 59 | North East Lincolnshire Council | E06000012 | 0.76 | F | 5.2 | 2025-11-19 | |
| 60 | Rutland County Council | E06000017 | 0.75 | F | 5.2 | 2025-11-19 | |
| 61 | Warwickshire County Council | E10000031 | 0.74 | F | 6.3 | 2025-11-19 | |
| 61 | City of Lincoln Council | E07000138 | 0.74 | F | 5.1 | 2025-11-19 | |
| 61 | City of Edinburgh Council | S12000036 | 0.74 | F | 6.3 | 2025-11-19 | |
| 64 | Chorley Council | E07000118 | 0.73 | F | 5.1 | 2025-11-19 | |
| 65 | South Kesteven District Council | E07000141 | 0.72 | F | 5.0 | 2025-11-19 | |
| 65 | Rochford District Council | E07000075 | 0.72 | F | 5.0 | 2025-11-19 | |
| 65 | Harborough District Council | E07000131 | 0.72 | F | 5.0 | 2025-11-19 | |
| 65 | Coventry City Council | E08000026 | 0.72 | F | 6.1 | 2025-11-19 | |
| 69 | West Yorkshire Combined Authority | E47000003 | 0.70 | F | 4.8 | 2025-11-19 | |
| 69 | King's Lynn and West Norfolk Borough Council | E07000146 | 0.70 | F | 5.9 | 2025-11-19 | |
| 71 | Tunbridge Wells Borough Council | E07000116 | 0.69 | F | 4.7 | 2025-11-19 | |
| 71 | Telford & Wrekin Council | E06000020 | 0.69 | F | 4.8 | 2025-11-19 | |
| 73 | Isle of Anglesey County Council | W06000001 | 0.68 | F | 4.7 | 2025-11-19 | |
| 73 | Basingstoke and Deane Borough Council | E07000084 | 0.68 | F | 4.7 | 2025-11-19 | |
| 75 | North Norfolk District Council | E07000147 | 0.67 | F | 4.6 | 2025-11-19 | |
| 75 | Guildford Borough Council | E07000209 | 0.67 | F | 4.6 | 2025-11-19 | |
| 77 | Watford Borough Council | E07000103 | 0.66 | F | 5.6 | 2025-11-19 | |
| 77 | Redditch Borough Council | E07000236 | 0.66 | F | 4.6 | 2025-11-19 | |
| 77 | Bolsover District Council | E07000033 | 0.66 | E | 2.6 | 2024-11-07 | BLOCKED |
| 77 | Armagh City, Banbridge and Craigavon | N09000002 | 0.66 | F | 4.6 | 2025-11-19 | |
| 81 | North of Tyne | E47000011 | 0.65 | D | 2.6 | 2024-11-07 | BLOCKED |
| 82 | Barnsley Metropolitan Borough Council | E08000016 | 0.65 | F | 4.5 | 2025-11-19 | |
| 83 | London Borough of Islington | E09000019 | 0.64 | F | 4.4 | 2025-11-19 | |
| 84 | Breckland District Council | E07000143 | 0.63 | F | 4.3 | 2025-11-19 | |
| 85 | South Ribble Borough Council | E07000126 | 0.62 | F | 5.3 | 2025-11-19 | |
| 85 | London Borough of Newham | E09000025 | 0.62 | F | 5.2 | 2025-11-19 | |
| 85 | Central Bedfordshire Council | E06000056 | 0.62 | F | 4.3 | 2025-11-19 | |
| 85 | Babergh District Council | E07000200 | 0.62 | F | 4.3 | 2025-11-19 | |
| 89 | Stroud District Council | E07000082 | 0.61 | F | 4.3 | 2025-11-19 | |
| 89 | Blaenau Gwent County Borough Council | W06000019 | 0.61 | F | 4.2 | 2025-09-04 | BLOCKED |
| 91 | Tonbridge and Malling Borough Council | E07000115 | 0.60 | D | 2.4 | 2024-10-16 | BLOCKED |
| 92 | Rugby Borough Council | E07000220 | 0.60 | F | 5.1 | 2025-11-19 | |
| 92 | Dacorum Council | E07000096 | 0.60 | D | 2.4 | 2024-10-16 | BLOCKED |
| 92 | Chesterfield Borough Council | E07000034 | 0.60 | F | 5.1 | 2025-11-19 | |
| 92 | Antrim and Newtownabbey | N09000001 | 0.60 | F | 4.2 | 2025-11-19 | |
| 96 | Mid Suffolk District Council | E07000203 | 0.59 | F | 4.1 | 2025-11-19 | |
| 96 | London Borough of Bexley | E09000004 | 0.59 | F | 4.1 | 2025-11-19 | |
| 96 | Broxtowe Borough Council | E07000172 | 0.59 | F | 4.1 | 2025-11-19 | |
| 99 | Sunderland City Council | E08000024 | 0.58 | F | 4.0 | 2025-11-19 | |
| 99 | Royal Borough of Kingston upon Thames | E09000021 | 0.58 | F | 4.9 | 2025-11-19 | |
| 101 | Calderdale Metropolitan Borough Council | E08000033 | 0.57 | F | 3.9 | 2025-11-19 | |
| 102 | West Northamptonshire | E06000062 | 0.56 | F | 4.8 | 2025-11-19 | |
| 102 | Rotherham Metropolitan Borough Council | E08000018 | 0.56 | F | 4.8 | 2025-11-19 | |
| 102 | Havant Borough Council | E07000090 | 0.56 | F | 3.9 | 2025-11-19 | |
| 102 | Blackpool Borough Council | E06000009 | 0.56 | F | 3.9 | 2025-11-19 | |
| 106 | Three Rivers District Council | E07000102 | 0.55 | F | 3.8 | 2025-11-19 | |
| 106 | East Riding of Yorkshire Council | E06000011 | 0.55 | F | 3.8 | 2025-11-19 | |
| 106 | Dundee City Council | S12000042 | 0.55 | F | 3.8 | 2025-11-19 | |
| 106 | Blackburn with Darwen Borough Council | E06000008 | 0.55 | D | 2.2 | 2024-10-16 | BLOCKED |
| 110 | Worcestershire County Council | E10000034 | 0.54 | F | 3.7 | 2025-11-19 | |
| 110 | Winchester City Council | E07000094 | 0.54 | F | 3.7 | 2025-11-19 | |
| 112 | Gedling Borough Council | E07000173 | 0.53 | F | 3.7 | 2025-11-19 | |
| 112 | Brentwood Borough Council | E07000068 | 0.53 | F | 3.7 | 2025-11-19 | |
| 114 | Newcastle-Under-Lyme District Council | E07000195 | 0.52 | F | 3.6 | 2025-11-19 | |
| 114 | New Forest District Council | E07000091 | 0.52 | F | 3.6 | 2025-11-19 | |
| 116 | Test Valley Borough Council | E07000093 | 0.51 | F | 3.5 | 2025-11-19 | |
| 116 | Burnley Borough Council | E07000117 | 0.51 | D | 2.0 | 2024-10-16 | BLOCKED |
| 118 | Rushmoor Borough Council | E07000092 | 0.50 | F | 3.4 | 2025-11-19 | |
| 119 | Milton Keynes | E06000042 | 0.49 | F | 3.4 | 2025-11-19 | |
| 119 | London Borough of Camden | E09000007 | 0.49 | F | 3.4 | 2025-11-19 | |
| 119 | Isle of Wight Council | E06000046 | 0.49 | F | 3.4 | 2025-11-19 | |
| 119 | Inverclyde Council | S12000018 | 0.49 | F | 3.4 | 2025-11-19 | |
| 119 | Gateshead Metropolitan Borough Council | E08000037 | 0.49 | F | 3.4 | 2025-11-19 | |
| 119 | Charnwood Borough Council | E07000130 | 0.49 | F | 4.1 | 2025-11-19 | |
| 125 | North Ayrshire Council | S12000021 | 0.48 | F | 3.4 | 2025-11-19 | |
| 125 | Hyndburn Borough Council | E07000120 | 0.48 | F | 3.3 | 2025-11-19 | |
| 125 | Aberdeenshire Council | S12000034 | 0.48 | F | 3.3 | 2025-11-19 | |
| 128 | South Tyneside Council | E08000023 | 0.47 | C | 1.9 | 2025-04-23 | BLOCKED |
| 129 | South Cambridgeshire District Council | E07000012 | 0.47 | F | 4.0 | 2025-11-19 | |
| 129 | Mid Ulster | N09000009 | 0.47 | F | 3.3 | 2025-11-19 | |
| 129 | London Borough of Redbridge | E09000026 | 0.47 | F | 3.2 | 2025-11-19 | |
| 129 | London Borough of Hounslow | E09000018 | 0.47 | F | 4.0 | 2025-11-19 | |
| 129 | Hart District Council | E07000089 | 0.47 | F | 3.3 | 2025-11-19 | |
| 129 | Devon County Council | E10000008 | 0.47 | F | 3.3 | 2025-11-19 | |
| 129 | Amber Valley Borough Council | E07000032 | 0.47 | F | 3.3 | 2025-11-19 | |
| 136 | Vale of White Horse District Council | E07000180 | 0.46 | F | 3.2 | 2025-11-19 | |
| 136 | Dorset Council | E06000059 | 0.46 | F | 3.2 | 2025-10-14 | BLOCKED |
| 138 | Bradford Metropolitan District Council | E08000032 | 0.45 | C | 1.8 | 2024-11-07 | BLOCKED |
| 139 | Blaby District Council | E07000129 | 0.45 | F | 3.1 | 2025-11-19 | |
| 140 | Trafford Metropolitan Borough Council | E08000009 | 0.44 | C | 1.8 | 2024-10-16 | BLOCKED |
| 141 | Tamworth Borough Council | E07000199 | 0.44 | F | 3.0 | 2025-11-19 | |
| 141 | Stevenage Borough Council | E07000243 | 0.44 | F | 3.0 | 2025-11-19 | |
| 143 | Wolverhampton City Council | E08000031 | 0.43 | F | 3.0 | 2025-11-19 | |
| 143 | Somerset County Council | E10000027 | 0.43 | F | 3.6 | 2025-11-19 | |
| 143 | Somerset Council | E06000066 | 0.43 | F | 3.6 | 2025-11-19 | |
| 143 | London Borough of Haringey | E09000014 | 0.43 | F | 3.7 | 2025-11-19 | |
| 143 | Fermanagh and Omagh | N09000006 | 0.43 | F | 3.0 | 2025-11-19 | |
| 148 | London Borough of Hillingdon | E09000017 | 0.42 | F | 2.9 | 2025-11-19 | |
| 148 | London Borough of Havering | E09000016 | 0.42 | F | 3.6 | 2025-11-19 | |
| 148 | Cheltenham Borough Council | E07000078 | 0.42 | F | 3.6 | 2025-11-19 | |
| 151 | Spelthorne Borough Council | E07000213 | 0.41 | F | 2.8 | 2025-11-19 | |
| 151 | Peterborough City Council | E06000031 | 0.41 | F | 2.8 | 2025-11-19 | |
| 151 | Perth and Kinross Council | S12000024 | 0.41 | F | 2.8 | 2025-11-19 | |
| 151 | Norfolk County Council | E10000020 | 0.41 | F | 2.9 | 2025-11-19 | |
| 151 | Folkestone and Hythe | E07000112 | 0.41 | F | 2.8 | 2025-11-19 | |
| 151 | Bristol City Council | E06000023 | 0.41 | F | 2.8 | 2025-11-19 | |
| 157 | Walsall Metropolitan Borough Council | E08000030 | 0.40 | F | 3.4 | 2025-11-19 | |
| 157 | Torfaen County Borough Council | W06000020 | 0.40 | F | 2.8 | 2025-11-19 | |
| 157 | Teignbridge District Council | E07000045 | 0.40 | C | 1.6 | 2024-12-10 | BLOCKED |
| 157 | Knowsley Metropolitan Borough Council | E08000011 | 0.40 | F | 2.8 | 2025-11-19 | |
| 157 | Hertfordshire County Council | E06000019 | 0.40 | F | 2.8 | 2025-11-19 | |
| 157 | Gloucester City Council | E07000081 | 0.40 | F | 2.8 | 2025-11-19 | |
| 163 | Wyre Forest District Council | E07000239 | 0.38 | F | 2.6 | 2025-11-19 | |
| 163 | Thanet District Council | E07000114 | 0.38 | F | 2.6 | 2025-11-19 | |
| 163 | Reigate & Banstead Borough Council | E07000211 | 0.38 | F | 2.6 | 2025-11-19 | |
| 163 | Malvern Hills District Council | E07000235 | 0.38 | C | 1.5 | 2025-08-07 | BLOCKED |
| 163 | Huntingdonshire District Council | E07000011 | 0.38 | F | 2.7 | 2025-11-19 | |
| 168 | Caerphilly County Borough Council | W06000018 | 0.37 | C | 1.5 | 2024-10-16 | BLOCKED |
| 169 | East Lindsey District Council | E07000137 | 0.36 | F | 2.5 | 2025-11-19 | |
| 169 | Cheshire West and Chester Council | E06000050 | 0.36 | F | 2.5 | 2025-11-19 | |
| 171 | Westmorland and Furness | E06000064 | 0.35 | E | 2.4 | 2025-11-19 | |
| 171 | South Gloucestershire Council | E06000025 | 0.35 | E | 2.4 | 2025-11-19 | |
| 171 | Powys County Council | W06000023 | 0.35 | E | 2.4 | 2025-11-19 | |
| 171 | North Northamptonshire | E06000061 | 0.35 | E | 2.9 | 2025-11-19 | |
| 171 | Mid and East Antrim | N09000008 | 0.35 | E | 2.4 | 2025-11-19 | |
| 171 | London Borough of Croydon | E09000008 | 0.35 | E | 2.4 | 2025-11-19 | |
| 171 | Falkirk Council | S12000014 | 0.35 | E | 2.4 | 2025-11-19 | |
| 171 | Aberdeen City Council | S12000033 | 0.35 | E | 2.9 | 2025-11-19 | |
| 179 | West Sussex County Council | E10000032 | 0.34 | E | 2.3 | 2025-11-19 | |
| 179 | Staffordshire County Council | E10000028 | 0.34 | E | 2.3 | 2025-11-19 | |
| 179 | St Helens Metropolitan Borough Council | E08000013 | 0.34 | E | 2.4 | 2025-11-19 | |
| 179 | Slough Borough Council | E06000039 | 0.34 | E | 2.4 | 2025-11-19 | |
| 179 | Lancaster City Council | E07000121 | 0.34 | E | 2.4 | 2025-11-19 | |
| 179 | East Suffolk Council | E07000244 | 0.34 | E | 2.3 | 2025-11-19 | |
| 179 | Ashford Borough Council | E07000105 | 0.34 | E | 2.4 | 2025-11-19 | |
| 179 | Argyll and Bute Council | S12000035 | 0.34 | E | 2.4 | 2025-11-19 | |
| 187 | South Holland District Council | E07000140 | 0.33 | E | 2.3 | 2025-11-19 | |
| 187 | Oxfordshire County Council | E10000025 | 0.33 | E | 2.3 | 2025-11-19 | |
| 187 | Lichfield District Council | E07000194 | 0.33 | E | 2.8 | 2025-11-19 | |
| 187 | Kingston-upon-Hull City Council | E06000010 | 0.33 | E | 2.3 | 2025-11-19 | |
| 187 | Fareham Borough Council | E07000087 | 0.33 | E | 2.3 | 2025-11-19 | |
| 187 | Basildon Borough Council | E07000066 | 0.33 | E | 2.3 | 2025-11-19 | |
| 187 | Ashfield District Council | E07000170 | 0.33 | E | 2.3 | 2025-11-19 | |
| 194 | Stratford-on-Avon District Council | E07000221 | 0.32 | E | 2.2 | 2025-11-19 | |
| 194 | Merthyr Tydfil County Borough Council | W06000024 | 0.32 | E | 2.2 | 2025-11-19 | |
| 194 | Lewes District Council | E07000063 | 0.32 | E | 2.2 | 2025-11-19 | |
| 194 | Eastbourne Borough Council | E07000061 | 0.32 | E | 2.2 | 2025-11-19 | |
| 194 | East Devon District Council | E07000040 | 0.32 | B | 1.3 | 2024-12-10 | BLOCKED |
| 199 | Westminster City Council | E09000033 | 0.31 | E | 2.6 | 2025-11-19 | |
| 199 | West Devon Borough Council | E07000047 | 0.31 | E | 2.2 | 2025-10-15 | BLOCKED |
| 199 | West Berkshire Council | E06000037 | 0.31 | E | 2.1 | 2025-11-19 | |
| 199 | South Yorkshire Mayoral Combined Authority | E47000002 | 0.31 | E | 2.1 | 2025-11-19 | |
| 199 | London Borough of Brent | E09000005 | 0.31 | E | 2.1 | 2025-11-19 | |
| 199 | Horsham District Council | E07000227 | 0.31 | E | 2.1 | 2025-11-19 | |
| 199 | East Hampshire District Council | E07000085 | 0.31 | E | 2.2 | 2025-11-19 | |
| 199 | Cannock Chase District Council | E07000192 | 0.31 | E | 2.2 | 2025-11-19 | |
| 199 | Ards and North Down | N09000011 | 0.31 | E | 2.2 | 2025-11-19 | |
| 208 | West Oxfordshire District Council | E07000181 | 0.30 | E | 2.1 | 2025-11-19 | |
| 208 | West Midlands | E47000007 | 0.30 | E | 2.1 | 2025-11-19 | |
| 208 | Warwick District Council | E07000222 | 0.30 | E | 2.0 | 2025-11-19 | |
| 208 | Suffolk County Council | E10000029 | 0.30 | E | 2.1 | 2025-11-19 | |
| 208 | Southampton City Council | E06000045 | 0.30 | E | 2.1 | 2025-11-19 | |
| 208 | Oxford City Council | E07000178 | 0.30 | E | 2.1 | 2025-11-19 | |
| 208 | Manchester City Council | E08000003 | 0.30 | E | 2.1 | 2025-11-19 | |
| 208 | East Lothian Council | S12000010 | 0.30 | E | 2.5 | 2025-11-19 | |
| 208 | East Ayrshire Council | S12000008 | 0.30 | E | 2.1 | 2025-11-19 | |
| 217 | Wychavon District Council | E07000238 | 0.29 | B | 1.2 | 2025-08-07 | BLOCKED |
| 218 | Stockport Metropolitan Borough Council | E08000007 | 0.29 | B | 1.1 | 2024-11-07 | BLOCKED |
| 219 | South Lanarkshire Council | S12000029 | 0.29 | E | 2.0 | 2025-11-19 | |
| 219 | Neath Port Talbot County Borough Council | W06000012 | 0.29 | E | 2.0 | 2025-11-19 | |
| 219 | London Borough of Tower Hamlets | E09000030 | 0.29 | E | 2.0 | 2025-11-19 | |
| 219 | London Borough of Enfield | E09000010 | 0.29 | E | 2.0 | 2025-11-19 | |
| 219 | Bolton Metropolitan Borough Council | E08000001 | 0.29 | E | 2.5 | 2025-11-19 | |
| 224 | Solihull Metropolitan Borough Council | E08000029 | 0.28 | E | 1.9 | 2025-11-19 | |
| 224 | North Lincolnshire Council | E06000013 | 0.28 | E | 1.9 | 2025-11-19 | |
| 224 | Newry, Mourne and Down | N09000010 | 0.28 | E | 2.4 | 2025-11-19 | |
| 224 | Newark and Sherwood District Council | E07000175 | 0.28 | E | 2.4 | 2025-11-19 | |
| 224 | Medway Council | E06000035 | 0.28 | E | 2.4 | 2025-11-19 | |
| 224 | Great Yarmouth Borough Council | E07000145 | 0.28 | E | 1.9 | 2025-10-14 | BLOCKED |
| 224 | Fylde Borough Council | E07000119 | 0.28 | E | 1.9 | 2025-11-19 | |
| 224 | Carmarthenshire County Council | W06000010 | 0.28 | E | 1.9 | 2025-11-19 | |
| 224 | Belfast | N09000003 | 0.28 | E | 1.9 | 2025-11-19 | |
| 233 | South Hams District Council | E07000044 | 0.27 | D | 1.9 | 2025-10-14 | BLOCKED |
| 234 | Sheffield City Council | E08000019 | 0.27 | D | 1.9 | 2025-11-19 | |
| 234 | Sevenoaks District Council | E07000111 | 0.27 | D | 1.9 | 2025-11-19 | |
| 234 | Kirklees Council | E08000034 | 0.27 | D | 1.9 | 2025-11-19 | |
| 234 | Hampshire County Council | E10000014 | 0.27 | D | 1.9 | 2025-11-19 | |
| 234 | Erewash Borough Council | E07000036 | 0.27 | D | 1.8 | 2025-11-19 | |
| 234 | Causeway Coast and Glens | N09000004 | 0.27 | D | 1.9 | 2025-11-19 | |
| 234 | Arun District Council | E07000224 | 0.27 | D | 1.9 | 2025-11-19 | |
| 241 | South Norfolk District Council | E07000149 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Rushcliffe Borough Council | E07000176 | 0.26 | D | 2.2 | 2025-11-19 | |
| 241 | Rochdale Metropolitan Borough Council | E08000005 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Rhondda Cynon Taf County Borough Council | W06000016 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Orkney Islands Council | S12000023 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Oadby and Wigston District Council | E07000135 | 0.26 | D | 2.2 | 2025-11-19 | |
| 241 | North Lanarkshire Council | S12000044 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Moray Council | S12000020 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Broadland District Council | E07000144 | 0.26 | D | 1.8 | 2025-11-19 | |
| 241 | Boston Borough Council | E07000136 | 0.26 | D | 1.8 | 2025-11-19 | |
| 251 | Warrington Borough Council | E06000007 | 0.25 | D | 2.1 | 2025-11-19 | |
| 251 | South Oxfordshire District Council | E07000179 | 0.25 | D | 1.7 | 2025-11-19 | |
| 251 | Shetland Islands Council | S12000027 | 0.25 | D | 1.7 | 2025-11-19 | |
| 251 | Sefton Metropolitan Borough Council | E08000014 | 0.25 | D | 2.2 | 2025-11-19 | |
| 251 | London Borough of Waltham Forest | E09000031 | 0.25 | D | 2.1 | 2025-11-19 | |
| 251 | Leicestershire County Council | E10000018 | 0.25 | D | 2.1 | 2025-11-19 | |
| 251 | Leeds City Council | E08000035 | 0.25 | D | 1.7 | 2025-11-19 | |
| 251 | Halton Borough Council | E06000006 | 0.25 | D | 1.8 | 2025-11-19 | |
| 251 | Cornwall Council | E06000052 | 0.25 | D | 2.1 | 2025-11-19 | |
| 251 | Cherwell District Council | E07000177 | 0.25 | D | 1.7 | 2025-11-19 | |
| 261 | Waverley Borough Council | E07000216 | 0.24 | D | 1.7 | 2025-11-19 | |
| 261 | Thurrock Council | E06000034 | 0.24 | D | 2.0 | 2025-11-19 | |
| 261 | Rother District Council | E07000064 | 0.24 | D | 1.7 | 2025-11-19 | |
| 261 | Oldham Metropolitan Borough Council | E08000004 | 0.24 | D | 1.7 | 2025-11-19 | |
| 261 | Nottingham City Council | E06000018 | 0.24 | D | 2.0 | 2025-11-19 | |
| 261 | Newport City Council | W06000022 | 0.24 | B | 1.0 | 2025-06-03 | BLOCKED |
| 261 | London Borough of Ealing | E09000009 | 0.24 | D | 1.7 | 2025-11-19 | |
| 261 | Cambridgeshire County Council | E10000003 | 0.24 | D | 1.7 | 2025-11-19 | |
| 269 | Redcar and Cleveland Council | E06000003 | 0.23 | D | 1.6 | 2025-11-19 | |
| 269 | North Yorkshire Council | E06000065 | 0.23 | D | 1.9 | 2025-11-19 | |
| 269 | North Tyneside Metropolitan Borough Council | E08000022 | 0.23 | D | 1.6 | 2025-11-19 | |
| 269 | Maldon District Council | E07000074 | 0.23 | D | 1.6 | 2025-11-19 | |
| 269 | London Borough of Lambeth | E09000022 | 0.23 | D | 1.6 | 2025-11-19 | |
| 269 | Epping Forest District Council | E07000072 | 0.23 | D | 1.6 | 2025-11-19 | |
| 269 | Dumfries and Galloway Council | S12000006 | 0.23 | B | 0.9 | 2025-04-23 | BLOCKED |
| 269 | Derbyshire Dales District Council | E07000035 | 0.23 | B | 0.9 | 2024-11-07 | BLOCKED |
| 269 | Conwy County Borough Council | W06000003 | 0.23 | D | 1.6 | 2025-11-19 | |
| 278 | West Lancashire Borough Council | E07000127 | 0.22 | D | 1.5 | 2025-11-19 | |
| 278 | Uttlesford District Council | E07000077 | 0.22 | D | 1.5 | 2025-11-19 | |
| 278 | Swindon Borough Council | E06000030 | 0.22 | D | 1.5 | 2025-11-19 | |
| 278 | North West Leicestershire District Council | E07000134 | 0.22 | D | 1.9 | 2025-11-19 | |
| 278 | London Borough of Bromley | E09000006 | 0.22 | D | 1.9 | 2025-11-19 | |
| 278 | Hastings Borough Council | E07000062 | 0.22 | D | 1.5 | 2025-11-19 | |
| 278 | Eastleigh Borough Council | E07000086 | 0.22 | B | 0.9 | 2025-04-23 | BLOCKED |
| 278 | Bridgend County Borough Council | W06000013 | 0.22 | D | 1.5 | 2025-11-19 | |
| 286 | West Dunbartonshire Council | S12000039 | 0.21 | B | 0.8 | 2024-10-16 | BLOCKED |
| 287 | Stoke-on-Trent City Council | E06000021 | 0.21 | D | 1.5 | 2025-11-19 | |
| 287 | Royal Borough of Kensington and Chelsea | E09000020 | 0.21 | D | 1.8 | 2025-11-19 | |
| 287 | Nottinghamshire County Council | E10000024 | 0.21 | D | 1.5 | 2025-11-19 | |
| 287 | North Somerset Council | E06000024 | 0.21 | D | 1.5 | 2025-11-19 | |
| 287 | London Borough of Hackney | E09000012 | 0.21 | D | 1.8 | 2025-11-19 | |
| 287 | Liverpool City Council | E08000012 | 0.21 | D | 1.4 | 2025-11-19 | |
| 287 | Ipswich Borough Council | E07000202 | 0.21 | D | 1.8 | 2025-11-19 | |
| 287 | East Cambridgeshire District Council | E07000009 | 0.21 | D | 1.8 | 2025-11-19 | |
| 287 | Darlington Borough Council | E06000005 | 0.21 | D | 1.7 | 2025-11-19 | |
| 287 | Chichester District Council | E07000225 | 0.21 | D | 1.5 | 2025-11-19 | |
| 287 | Cheshire East Council (Unitary) | E06000049 | 0.21 | D | 1.4 | 2025-11-19 | |
| 287 | Angus Council | S12000041 | 0.21 | D | 1.7 | 2025-11-19 | |
| 299 | Salford City Council | E08000006 | 0.20 | B | 0.8 | 2024-10-16 | BLOCKED |
| 300 | Renfrewshire Council | S12000038 | 0.20 | C | 1.4 | 2025-11-19 | |
| 300 | London Borough of Richmond upon Thames | E09000027 | 0.20 | C | 1.7 | 2025-11-19 | |
| 300 | Hertsmere Borough Council | E07000098 | 0.20 | C | 1.4 | 2025-11-19 | |
| 300 | Gravesham Borough Council | E07000109 | 0.20 | C | 1.4 | 2025-11-19 | |
| 300 | East Renfrewshire Council | S12000011 | 0.20 | C | 1.4 | 2025-11-19 | |
| 300 | Doncaster Metropolitan Borough Council | E08000017 | 0.20 | C | 1.4 | 2025-11-19 | |
| 300 | Bedford Borough Council | E06000055 | 0.20 | C | 1.4 | 2025-11-19 | |
| 307 | Wigan Metropolitan Borough Council | E08000010 | 0.19 | C | 1.3 | 2025-11-19 | |
| 307 | Torridge District Council | E07000046 | 0.19 | C | 1.3 | 2025-11-19 | |
| 307 | Stafford Borough Council | E07000197 | 0.19 | C | 1.3 | 2025-11-19 | |
| 307 | South Ayrshire Council | S12000028 | 0.19 | C | 1.3 | 2025-11-19 | |
| 307 | Mole Valley District Council | E07000210 | 0.19 | C | 1.6 | 2025-11-19 | |
| 307 | London Borough of Lewisham | E09000023 | 0.19 | C | 1.3 | 2025-11-19 | |
| 307 | High Peak Borough Council | E07000037 | 0.19 | C | 1.3 | 2025-11-19 | |
| 307 | Bath and North East Somerset Council | E06000022 | 0.19 | C | 1.3 | 2025-11-19 | |
| 315 | Wiltshire Council | E06000054 | 0.18 | C | 1.2 | 2025-11-19 | |
| 315 | Elmbridge Borough Council | E07000207 | 0.18 | C | 1.3 | 2025-11-19 | |
| 315 | City of York Council | E06000014 | 0.18 | C | 1.5 | 2025-11-19 | |
| 315 | City of London | E09000001 | 0.18 | C | 1.5 | 2025-11-19 | |
| 315 | Borough of Broxbourne | E07000095 | 0.18 | C | 1.2 | 2025-11-19 | |
| 320 | Wrexham County Borough Council | W06000006 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | West Lothian Council | S12000040 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | Royal Borough of Windsor and Maidenhead | E06000040 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | Northumberland Council | E06000057 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | Leicester City Council | E06000016 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | Gosport Borough Council | E07000088 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | Epsom and Ewell Borough Council | E07000208 | 0.17 | C | 1.4 | 2025-11-19 | |
| 320 | East Staffordshire Borough Council | E07000193 | 0.17 | A | 0.7 | 2025-01-07 | BLOCKED |
| 320 | Cotswold District Council | E07000079 | 0.17 | C | 1.4 | 2025-11-19 | |
| 320 | Ceredigion County Council | W06000008 | 0.17 | C | 1.2 | 2025-11-19 | |
| 320 | Braintree District Council | E07000067 | 0.17 | C | 1.4 | 2025-11-19 | |
| 331 | Wokingham Borough Council | E06000041 | 0.16 | C | 1.1 | 2025-11-19 | |
| 331 | Plymouth City Council | E06000026 | 0.16 | C | 1.1 | 2025-11-19 | |
| 331 | Pendle Borough Council | E07000122 | 0.16 | C | 1.1 | 2025-11-19 | |
| 331 | Hinckley and Bosworth Borough Council | E07000132 | 0.16 | C | 1.4 | 2025-11-19 | |
| 335 | Wirral Council | E08000015 | 0.15 | C | 1.3 | 2025-11-19 | |
| 335 | Surrey County Council | E10000030 | 0.15 | C | 1.0 | 2025-11-19 | |
| 335 | Preston City Council | E07000123 | 0.15 | C | 1.1 | 2025-11-19 | |
| 335 | Nuneaton and Bedworth Borough Council | E07000219 | 0.15 | C | 1.0 | 2025-11-19 | |
| 335 | North Warwickshire Borough Council | E07000218 | 0.15 | C | 1.1 | 2025-11-19 | |
| 335 | Melton Borough Council | E07000133 | 0.15 | C | 1.3 | 2025-11-19 | |
| 335 | London Borough of Wandsworth | E09000032 | 0.15 | C | 1.0 | 2025-11-19 | |
| 335 | London Borough of Merton | E09000024 | 0.15 | C | 1.1 | 2025-11-19 | |
| 335 | London Borough of Barnet | E09000003 | 0.15 | C | 1.1 | 2025-11-19 | |
| 335 | Forest of Dean District Council | E07000080 | 0.15 | C | 1.3 | 2025-11-19 | |
| 335 | Durham County Council | E06000047 | 0.15 | C | 1.1 | 2025-11-19 | |
| 335 | Bassetlaw District Council | E07000171 | 0.15 | C | 1.1 | 2025-11-19 | |
| 347 | West Suffolk | E07000245 | 0.14 | B | 1.0 | 2025-11-19 | |
| 347 | Lancashire County Council | E10000017 | 0.14 | B | 1.0 | 2025-11-19 | |
| 347 | Glasgow City Council | S12000046 | 0.14 | B | 1.0 | 2025-11-19 | |
| 347 | Fife Council | S12000015 | 0.14 | B | 1.0 | 2025-11-19 | |
| 347 | East Sussex County Council | E10000011 | 0.14 | B | 1.0 | 2025-11-19 | |
| 347 | Castle Point Borough Council | E07000069 | 0.14 | B | 0.9 | 2025-11-19 | |
| 353 | Mid Sussex District Council | E07000228 | 0.13 | B | 1.1 | 2025-11-19 | |
| 353 | Isles of Scilly | E06000053 | 0.13 | B | 0.9 | 2025-11-19 | |
| 353 | Highland Council | S12000017 | 0.13 | B | 1.1 | 2025-11-19 | |
| 353 | Harlow Council | E07000073 | 0.13 | B | 1.1 | 2025-11-19 | |
| 353 | Fenland District Council | E07000010 | 0.13 | B | 0.9 | 2025-11-19 | |
| 353 | East Dunbartonshire Council | S12000045 | 0.13 | B | 1.1 | 2025-11-19 | |
| 353 | Derbyshire County Council | E10000007 | 0.13 | B | 0.9 | 2025-11-19 | |
| 353 | Bracknell Forest Council | E06000036 | 0.13 | B | 0.9 | 2025-11-19 | |
| 353 | Bournemouth, Christchurch and Poole | E06000058 | 0.13 | B | 0.9 | 2025-11-19 | |
| 362 | Wyre Council | E07000128 | 0.12 | B | 0.8 | 2025-11-19 | |
| 362 | Staffordshire Moorlands District Council | E07000198 | 0.12 | B | 0.8 | 2025-11-19 | |
| 362 | Pembrokeshire County Council | W06000009 | 0.12 | B | 0.8 | 2025-11-19 | |
| 362 | Dover District Council | E07000108 | 0.12 | B | 0.9 | 2025-11-19 | |
| 366 | Norwich City Council | E07000148 | 0.11 | B | 0.8 | 2025-11-19 | |
| 366 | North East Derbyshire District Council | E07000038 | 0.11 | A | 0.5 | 2024-10-16 | BLOCKED |
| 366 | Cumberland | E06000063 | 0.11 | B | 0.8 | 2025-11-19 | |
| 369 | Swansea City and Borough Council | W06000011 | 0.10 | B | 0.7 | 2025-11-19 | |
| 369 | Shropshire Council - Unitary | E06000051 | 0.10 | B | 0.7 | 2025-11-19 | |
| 369 | Bury Metropolitan Borough Council | E08000002 | 0.10 | B | 0.7 | 2025-11-19 | |
| 372 | Gwynedd County Council | W06000002 | 0.09 | B | 0.6 | 2025-11-19 | |
| 372 | Adur and Worthing Borough Council | E07000223 | 0.09 | B | 0.7 | 2025-11-19 | |
| 374 | Stirling Council | S12000030 | 0.08 | B | 0.5 | 2025-10-14 | BLOCKED |
| 375 | Scottish Borders Council | S12000026 | 0.08 | B | 0.7 | 2025-11-19 | |
| 375 | Midlothian Council | S12000019 | 0.08 | B | 0.7 | 2025-11-19 | |
| 375 | Essex County Council | E10000012 | 0.08 | B | 0.5 | 2025-11-19 | |
| 375 | Crawley Borough Council | E07000226 | 0.08 | B | 0.5 | 2025-11-19 | |
| 375 | Buckinghamshire | E06000060 | 0.08 | B | 0.7 | 2025-11-19 | |
| 380 | Worcester City Council | E07000237 | 0.07 | A | 0.5 | 2025-11-19 | |
| 380 | Vale of Glamorgan Council | W06000014 | 0.07 | A | 0.5 | 2025-11-19 | |
| 380 | Royal Borough of Greenwich | E09000011 | 0.07 | A | 0.6 | 2025-11-19 | |
| 380 | Mansfield District Council | E07000174 | 0.07 | A | 0.5 | 2025-11-19 | |
| 380 | Luton Borough Council | E06000032 | 0.07 | A | 0.6 | 2025-11-19 | |
| 380 | Denbighshire County Council | W06000004 | 0.07 | A | 0.5 | 2025-11-19 | |
| 380 | Clackmannanshire Council | S12000005 | 0.07 | A | 0.6 | 2025-11-19 | |
| 387 | Canterbury City Council | E07000106 | 0.06 | A | 0.5 | 2025-11-19 | |
| 388 | Brighton and Hove City Council | E06000043 | 0.05 | A | 0.4 | 2025-11-19 | |
| 389 | Torbay Council | E06000027 | 0.04 | A+ | 0.3 | 2025-11-19 | |
| 389 | Mid Devon District Council | E07000042 | 0.04 | A+ | 0.3 | 2025-11-19 | |
| 389 | Kent County Council | E10000016 | 0.04 | A+ | 0.2 | 2025-11-19 |
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.
