LS21 tap water: what's in it?
Yorkshire Water: at least 69 tests failed UK drinking-water standards in 2025 (DWI, company-wide).
Some published DWI figures don't reconcile or identify a company, so we've left them out; the true number may be higher. England overall: 99.97% of tests met standards.
LS21 tap water quality report · 2026
Hardness
Soft
Graincliffe 2004 (supply zone) · 1 January 2024 to 31 December 2024
Details
Graincliffe 2004 (supply zone) · 1 January 2024 to 31 December 2024
Hosepipe ban
No hosepipe ban
Checked 11 October 2026 at 02:34
Details
Checked 11 October 2026 at 02:34
Storm overflows
87 overflows within 10 km of LS21 centre
2,291 spills in 2025
Details
2,291 spills in 2025
Lead pipes
71% built before 1973
Estimate, not a test. Homes in the parts of LS21 we can match to council-tax records (100% of its postcodes) whose build period is known; the share with no recorded build period isn't published for these areas. Allowing for suppressed counts: 69–71%. England and Wales: 61% (2026).
Details
Estimate, not a test. Homes in the parts of LS21 we can match to council-tax records (100% of its postcodes) whose build period is known; the share with no recorded build period isn't published for these areas. Allowing for suppressed counts: 69–71%. England and Wales: 61% (2026).
Who supplies water in LS21
Supplies 651 of 651 postcodes (100%)
Sewerage: Usually Yorkshire Water — they provide water and sewerage across most of their area. Your water bill confirms yours.
Drinking-water test record
Yorkshire Water: 651 of 651 postcodes
Yorkshire Water
Yorkshire Water, company-wide
- Regulator
- DWI
- Report year
- 2025
- Failed tests
- Not shown
- Tests
- 388,919
The regulator's published total and its company rows disagree, so we don't show a count.
| Parameter | Failed tests |
|---|---|
| E. coli (confirmed) | Failed tests: 4 |
| Enterococci (confirmed) | Failed tests: 2 |
| Iron | Failed tests: 20 |
| Lead | Failed tests: 6 |
| Nickel | Failed tests: 7 |
| Total coliforms (confirmed) | Failed tests: 30 |
Source: DWI england 2025, Annex B — dated 6 July 2026, read 13 October 2026
Source: DWI england 2025, Annex A — dated 6 July 2026, read 13 October 2026
England: 99.97% of tests met standards in 2025 (DWI).
Source: DWI england 2025, national compliance — dated 6 July 2026, read 13 October 2026
How hard is the water in LS21?
59% of LS21's postcodes are in the Graincliffe 2004 supply zone (Yorkshire Water): 56 mg/l, soft.
Graincliffe 2004 · Yorkshire Water (382 of 651 postcodes)
56 mg/l · 3.9 °Clark · 3.1 °dH · 5.6 °fH
Zone average.
Graincliffe 2004 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
6 identified supply zones in LS21
Graincliffe 2004 · Yorkshire Water (382 of 651 postcodes)
56 mg/l · 3.9 °Clark · 3.1 °dH · 5.6 °fH
Zone average.
Graincliffe 2004 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
Leeds LL Bramhope and Alwoodley 2019 · Yorkshire Water (134 of 651 postcodes)
138 mg/l · 9.7 °Clark · 7.7 °dH · 13.8 °fH
Zone average.
Leeds LL Bramhope and Alwoodley 2019 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
Pateley Bridge and Ripon 2019 · Yorkshire Water (33 of 651 postcodes)
73 mg/l · 5.1 °Clark · 4.1 °dH · 7.3 °fH
Zone average.
Pateley Bridge and Ripon 2019 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
Harrogate South 2019 · Yorkshire Water (11 of 651 postcodes)
69 mg/l · 4.9 °Clark · 3.9 °dH · 6.9 °fH
Zone average.
Harrogate South 2019 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
Yeadon 2024 · Yorkshire Water (4 of 651 postcodes)
55 mg/l · 3.9 °Clark · 3.1 °dH · 5.5 °fH
Zone average.
Yeadon 2024 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
Leeds HL Harewood and Shadwell 2024 · Yorkshire Water (2 of 651 postcodes)
136 mg/l · 9.5 °Clark · 7.6 °dH · 13.6 °fH
Zone average.
Leeds HL Harewood and Shadwell 2024 (supply zone) · 1 January 2024 to 31 December 2024
Source: Yorkshire Water — dated 1 January 2024 to 31 December 2024, read 29 September 2026
85 postcodes without an identified supply zone
Yorkshire Water (85 of 651 postcodes)
We do not have a verified hardness figure for this area. Ask your water company for its water quality report.
Storm overflows nearby
87 overflows within 10 km of LS21 centre · 2,291 spills in 2025
LS21 (district) · 2025
Source: Environment Agency EDM annual return 2025 — dated 20 August 2026, read 13 October 2026
Overflows here are run by Yorkshire Water.
58 of these were monitored for only part of 2025.
Nearest 5 shown
OTLEY SEWAGE TREATMENT WORKS
Into RIVER WHARFE · 0.2 km from the centre of LS21
42 spills · 367 hours · Monitored 100% of 2025
OTLEY SEWAGE TREATMENT WORKS
Into RIVER WHARFE · 0.2 km from the centre of LS21
0 spills · 0 hours · Monitored 100% of 2025
BRIDGE STREET SSO
Into RIVER WHARFE · 1 km from the centre of LS21
11 spills · 23.3 hours · Monitored 67.9% of 2025
BILLAMS HILL SSO
Into RIVER WHARFE · 1.1 km from the centre of LS21
49 spills · 132.8 hours · Monitored 99.9% of 2025
ILKLEY ROAD
Into RIVER WHARFE · 1.7 km from the centre of LS21
28 spills · 52.5 hours · Monitored 100% of 2025
Annual 2025 figures from monitored overflows. Not live, and not a bathing-water or tap-water verdict.
- 57 England outfalls in the 2025 return had no usable location and aren't counted.
- Northern Ireland isn't covered: No licensed annual per-outfall source in the approved source list; BT postcode coordinates require an LPS licence.
Older homes and lead pipes
71% built before 1973
71% of homes here were built before 1973 — estimate, not a test.
Homes in the parts of LS21 we can match to council-tax records (100% of its postcodes) whose build period is known; the share with no recorded build period isn't published for these areas. Allowing for suppressed counts: 69–71%. England and Wales: 61% (2026).
Older homes are more likely to have lead pipes. Only a test tells you whether yours does.
LS21 (district) · 2026
Source: Valuation Office Agency, Council Tax: stock of properties — dated 31 March 2026, read 24 September 2026
Fluoride
We cannot confirm whether this area is part of a water fluoridation scheme. Ask your water supplier using your postcode.
Around one in ten people in England receive drinking water supplied by a fluoridation scheme.
England · 2026 health monitoring report
Source: UKHSA and DHSC — dated 30 March 2026, read 13 October 2026
Hosepipe bans
What you can do
As an Amazon Associate we earn from qualifying purchases. Links go to amazon.com; Amazon's Earn Globally service can localise them to amazon.co.uk. Check the model and UK delivery before buying.
Water filter jugs
LifeStraw
LSH7GLSPK21
Performance certification:
Certified by WQA to NSF/ANSI 42 for Aesthetic Chlorine and Taste and Odor; Certified by WQA to NSF/ANSI 53 for Lead and Mercury; Certified by WQA to NSF/ANSI 401 for Microplastics (a US/international standard; it is not UK approval)
View Detailsreduces chlorine taste and odour in drinking water.
A UK retailer lists this model. Amazon UK stock and delivery are unverified; this Amazon link may not ship to the UK. Check the exact model and UK delivery before you pay.
UK availability evidence checked 14 October 2026.
Shower filters
Weddell Water
WD-100BL
Performance certification:
Certified by NSF to NSF/ANSI 177 for Free Available Chlorine Reduction (a US/international standard; it is not UK approval)
View Detailsreduces chlorine in shower water; does not soften water.
A UK retailer lists this model. Amazon UK stock and delivery are unverified; this Amazon link may not ship to the UK. Check the exact model and UK delivery before you pay.
Check it fits your shower fitting before buying; a US fitting may need an adaptor.
UK availability evidence checked 14 October 2026.
We haven't verified a lead test kit for UK buyers yet.
What a pick has to pass:
- A lead result reported by a laboratory accredited for that test (UKAS, ISO/IEC 17025), named on the kit's listing
- UK availability evidenced by Amazon UK, the manufacturer or a UK retailer, checked in the last 90 days
Start with your water company: if you think you have lead pipes, you can ask it to test the water at your kitchen tap. Which water test you need
Common water problems
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Water softener cost UK 2026: price by home size
Why is my tap water cloudy or white?
Why is my tap water cloudy or white? (UK)
Brown tap water: causes and what to do (UK)
Why does my tap water taste metallic?
Tap water tastes metallic? Causes and fixes (UK)
Questions about tap water in LS21
- Is the water in LS21 hard or soft?
- Yorkshire Water: soft, 56 mg/l, 3.9 °Clark, 3.1 °dH, 5.6 °fH (Graincliffe 2004 (supply zone), 1 January 2024 to 31 December 2024). Zone average. Yorkshire Water: slightly hard, 138 mg/l, 9.7 °Clark, 7.7 °dH, 13.8 °fH (Leeds LL Bramhope and Alwoodley 2019 (supply zone), 1 January 2024 to 31 December 2024). Zone average. Yorkshire Water: We do not have a verified hardness figure for this area. Ask your water company for its water quality report. Yorkshire Water: soft, 73 mg/l, 5.1 °Clark, 4.1 °dH, 7.3 °fH (Pateley Bridge and Ripon 2019 (supply zone), 1 January 2024 to 31 December 2024). Zone average. Yorkshire Water: soft, 69 mg/l, 4.9 °Clark, 3.9 °dH, 6.9 °fH (Harrogate South 2019 (supply zone), 1 January 2024 to 31 December 2024). Zone average. Yorkshire Water: soft, 55 mg/l, 3.9 °Clark, 3.1 °dH, 5.5 °fH (Yeadon 2024 (supply zone), 1 January 2024 to 31 December 2024). Zone average. Yorkshire Water: slightly hard, 136 mg/l, 9.5 °Clark, 7.6 °dH, 13.6 °fH (Leeds HL Harewood and Shadwell 2024 (supply zone), 1 January 2024 to 31 December 2024). Zone average.
- What does the drinking water regulator's record show for LS21?
- Yorkshire Water: at least 69 tests failed UK drinking-water standards in 2025 (DWI, company-wide). Some published DWI figures don't reconcile or identify a company, so we've left them out; the true number may be higher. England overall: 99.97% of tests met standards.
- Could homes in LS21 have lead pipes?
- 71% of homes here were built before 1973 — estimate, not a test. Homes in the parts of LS21 we can match to council-tax records (100% of its postcodes) whose build period is known; the share with no recorded build period isn't published for these areas. Allowing for suppressed counts: 69–71%. England and Wales: 61% (2026). Older homes are more likely to have lead pipes. Only a test tells you whether yours does.
- Is the water in LS21 fluoridated?
- We cannot confirm whether this area is part of a water fluoridation scheme. Ask your water supplier using your postcode. Around one in ten people in England receive drinking water supplied by a fluoridation scheme.
Sources and method
- Water Company Boundaries (UC2) ↗ · 19 September 2026 · read 20 September 2026
- Yorkshire Water contact page ↗ · 13 October 2026 · read 13 October 2026
- DWI england 2025, Annex B ↗ · 2025 · read 13 October 2026
- DWI england 2025, national compliance ↗ · 2025 · read 13 October 2026
- Yorkshire Water ↗ · 1 January 2024 to 31 December 2024 · read 29 September 2026
- Environment Agency EDM annual return 2025 ↗ · 2025 · read 13 October 2026
- Valuation Office Agency, Council Tax: stock of properties ↗ · 2026 · read 24 September 2026
- UKHSA and DHSC ↗ · 2026 health monitoring report · read 13 October 2026
- Yorkshire Water ↗ · 11 October 2026 · read 11 October 2026
Yorkshire Water contact page, Yorkshire Water, Yorkshire Water, Yorkshire Water, Yorkshire Water, Yorkshire Water, Yorkshire Water, Yorkshire Water: Database right, used under the publisher's terms.
Water company boundaries © Water UK, licensed under CC BY 4.0Contains public sector information licensed under the Open Government Licence v3.0
Data generation uk-2026-10-16-derive6