Derby City Council - E06000015ACTIVE

Emissions

• URL: https://www.derby.gov.uk/

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  CO2 estimatePage size

  Note: from 1st November 2022 we adopted version 3 of the methodology for estimating CO2 emissions. This will tend to lower CO2 estimates for a given size.

  Date checked	CO2 / grams	Rating	Page size	Energy
  2025-03-05	0.92	F	3.6MB	GRID?
  2025-02-11	1.03	F	4.1MB	GRID?
  2025-01-07	1.07	F	4.2MB	GRID?
  2024-12-10	1.12	F	4.5MB	GRID?
  2024-11-07	1.04	F	4.1MB	GRID?
  2024-10-16	0.93	F	3.7MB	GRID?
  2024-09-26	0.96	F	3.8MB	GRID?
  2024-08-07	0.97	F	3.8MB	GRID?
  2024-07-09	1.12	F	4.4MB	GRID?
  2024-06-11	0.88	F	3.5MB	GRID?
  2024-05-07	1.21	F	4.8MB	GRID?
  2023-05-02	1.12	F	4.4MB	GRID?
  2023-04-05	1.72	F	6.8MB	GRID?
  2023-03-02	0.62	D	2.5MB	GRID?
  2023-02-07	0.47	C	1.9MB	GRID?
  2023-01-03	0.73	E	2.9MB	GRID?
  2022-12-01	0.87	F	3.5MB	GRID?
  2022-11-01	1.79	F	7.1MB	GRID?
  2022-10-04	1.54	F	2.6MB	GRID?
  2022-08-24	1.25	F	2.1MB	GRID?
  2022-07-21	2.87	F	4.8MB	GRID?
  2022-06-08	1.73	F	2.9MB	GRID?
  2022-05-05	1.82	F	3.0MB	GRID?
  2022-04-06	1.51	F	2.5MB	GRID?
  2022-03-01	1.25	F	2.1MB	GRID?
  2022-02-01	3.02	F	5.0MB	GRID?
  2022-01-04	1.97	F	3.3MB	GRID?
  2021-12-08	1.45	F	2.4MB	GRID?
  2021-11-02	1.38	F	2.3MB	GRID?
  2021-10-06	1.70	F	2.8MB	GRID?
  2021-08-31	1.31	F	2.2MB	GRID?
  2021-07-29	1.74	F	2.9MB	GRID?
  2021-06-30	1.80	F	3.0MB	GRID?
  2021-05-26	2.79	F	4.6MB	GRID?
  2021-03-09	1.84	F		GRID?

  Tip: Optimise images

  We estimate potential to save at least 71kB* by optimising images:

  1. derby-winter-2024.jpg is 182kB
  2. family-hubs-still-ne... is 90kB and could be 20kB smaller
  3. cost-of-living-small... is 82kB
  4. market-hall-roof.jpg is 81kB
  5. foster-parent-and-ch... is 63kB and could be 17kB smaller
  6. ebilling-laptop-home... is 39kB and could be 26kB smaller
  7. home-energy.jpg is 27kB and could be 8.4kB smaller

  First, check that images are appropriately sized - you most likely don't need a 6000x4000 pixel image straight from a digital camera. In Windows, the Photos software will let you quickly shrink huge images and will give you an improvement.

  Next you could try using tinyjpg.com (JPG image) or tinypng.com (PNG image) to further optimise your image. This will strip out metadata that may be taking up lots of space.

  *This is an estimate from Google PageSpeed and you may get much better results than this in practice.

  Tip: Large files

  Aside from images, here are the biggest resources:

  1. app-8bcc8070.js is 1.5MB
  2. index.js is 375kB
  3. js?id=G-G9H7HD8WSH is 145kB
  4. home.css is 144kB
  5. mc-validate.js is 143kB
  6. 135.4755a93fc5065f342da8.js is 89kB

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. Google Tag Manager uses 145kB
  2. Browsealoud uses 292kB
  3. Amazon Web Services uses 143kB
  4. Google Fonts uses 47kB

  Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading.

  

External data links

• Find that Postcode
• ONS Linked Data
• Boundary (GeoJSON)