DH1 tap water: what's in it?
Northumbrian, Essex and Suffolk Water group (figures include Northumbrian Water): at least 36 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.
DH1 tap water quality report · 2026
Hardness
Soft
Derwent Trunk Main South & Durham Zone (supply zone) · January 2025 to December 2025
Details
Derwent Trunk Main South & Durham Zone (supply zone) · January 2025 to December 2025
Hosepipe ban
No hosepipe ban
Checked 11 October 2026 at 02:34
Details
Checked 11 October 2026 at 02:34
Storm overflows
203 overflows within 10 km of DH1 centre
3,236 spills in 2025
Details
3,236 spills in 2025
Lead pipes
58% built before 1973
Estimate, not a test. Homes in the parts of DH1 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: 57–58%. England and Wales: 61% (2026).
Details
Estimate, not a test. Homes in the parts of DH1 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: 57–58%. England and Wales: 61% (2026).
Who supplies water in DH1
Part of Northumbrian, Essex and Suffolk Water
Supplies 1,332 of 1,332 postcodes (100%)
Sewerage: Usually Northumbrian Water — they provide water and sewerage across most of their area. Your water bill confirms yours.
Drinking-water test record
Northumbrian Water: 1,332 of 1,332 postcodes
Northumbrian Water
Northumbrian, Essex and Suffolk Water group, includes Northumbrian Water
- Regulator
- DWI
- Report year
- 2025
- Failed tests
- Not shown
- Tests
- 266,202
The regulator's published total and its company rows disagree, so we don't show a count.
| Parameter | Failed tests |
|---|---|
| Aluminium | Failed tests: 4 |
| E. coli (confirmed) | Failed tests: 3 |
| Enterococci (confirmed) | Failed tests: 1 |
| Iron | Failed tests: 9 |
| Lead | Failed tests: 5 |
| Manganese | Failed tests: 3 |
| Nickel | Failed tests: 2 |
| Nitrite – consumers taps | Failed tests: 1 |
| Sodium | Failed tests: 1 |
| Total coliforms (confirmed) | Failed tests: 7 |
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 DH1?
73% of DH1's postcodes are in the Derwent Trunk Main South & Durham Zone supply zone (Northumbrian Water): 57 mg/l, soft.
Derwent Trunk Main South & Durham Zone · Northumbrian Water (966 of 1,332 postcodes)
57 mg/l · 4.0 °Clark · 3.2 °dH · 5.7 °fH
Zone average.
Derwent Trunk Main South & Durham Zone (supply zone) · January 2025 to December 2025
Source: Northumbrian Water — dated January 2025 to December 2025, read 28 September 2026
2 identified supply zones in DH1
Derwent Trunk Main South & Durham Zone · Northumbrian Water (966 of 1,332 postcodes)
57 mg/l · 4.0 °Clark · 3.2 °dH · 5.7 °fH
Zone average.
Derwent Trunk Main South & Durham Zone (supply zone) · January 2025 to December 2025
Source: Northumbrian Water — dated January 2025 to December 2025, read 28 September 2026
Sacriston Zone · Northumbrian Water (307 of 1,332 postcodes)
57 mg/l · 4.0 °Clark · 3.2 °dH · 5.7 °fH
Zone average.
Sacriston Zone (supply zone) · January 2025 to December 2025
Source: Northumbrian Water — dated January 2025 to December 2025, read 28 September 2026
59 postcodes without an identified supply zone
Northumbrian Water (59 of 1,332 postcodes)
We do not have a verified hardness figure for this area. Ask your water company for its water quality report.
Storm overflows nearby
203 overflows within 10 km of DH1 centre · 3,236 spills in 2025
DH1 (district) · 2025
Source: Environment Agency EDM annual return 2025 — dated 20 August 2026, read 13 October 2026
Overflows here are run by Northumbrian Water.
197 of these were monitored for only part of 2025.
Nearest 5 shown
BARKERS HAUGH CSO NO. 10
Into RIVER WEAR · 0 km from the centre of DH1
4 spills · 7.2 hours · Monitored 99.4% of 2025
SANDS SYPHON SSO
Into RIVER WEAR · 0.1 km from the centre of DH1
49 spills · 145.6 hours · Monitored 99.9% of 2025
BARKERS HAUGH STW
Into WEAR · 0.3 km from the centre of DH1
41 spills · 344.2 hours · Monitored 99.6% of 2025
BARKERS HAUGH NO 8 CSO
Into RIVER WEAR · 0.6 km from the centre of DH1
22 spills · 76.9 hours · Monitored 100% of 2025
FRANKLAND LANE CSO
Into RIVER WEAR · 0.6 km from the centre of DH1
40 spills · 184.9 hours · Monitored 93.7% 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
58% built before 1973
58% of homes here were built before 1973 — estimate, not a test.
Homes in the parts of DH1 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: 57–58%. England and Wales: 61% (2026).
Older homes are more likely to have lead pipes. Only a test tells you whether yours does.
DH1 (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 DH1
- Is the water in DH1 hard or soft?
- Northumbrian Water: soft, 57 mg/l, 4.0 °Clark, 3.2 °dH, 5.7 °fH (Derwent Trunk Main South & Durham Zone (supply zone), January 2025 to December 2025). Zone average. Northumbrian Water: soft, 57 mg/l, 4.0 °Clark, 3.2 °dH, 5.7 °fH (Sacriston Zone (supply zone), January 2025 to December 2025). Zone average. Northumbrian Water: We do not have a verified hardness figure for this area. Ask your water company for its water quality report.
- What does the drinking water regulator's record show for DH1?
- Northumbrian, Essex and Suffolk Water group (figures include Northumbrian Water): at least 36 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 DH1 have lead pipes?
- 58% of homes here were built before 1973 — estimate, not a test. Homes in the parts of DH1 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: 57–58%. 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 DH1 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
- Northumbrian 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
- Northumbrian Water ↗ · January 2025 to December 2025 · read 28 September 2026
- Northumbrian Water ↗ · January 2025 to December 2025 · read 28 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
- Environment Agency ↗ · 11 October 2026 · read 11 October 2026
Northumbrian Water contact page, Northumbrian Water, Northumbrian 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 v3.0All content is available under the Open Government Licence v3.0, except where otherwise stated © Crown copyright
Data generation uk-2026-10-16-derive6