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Regulator record

CW1 tap water: what's in it?

United Utilities: at least 57 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.

CW1 tap water quality report · 2026

  • Hardness

    Soft

    Details

    Gorsty North (supply zone) · 12-month average, updated 25 September 2026; 51 samples

  • Hosepipe ban

    Not available

    Details

    We can't confirm the hosepipe-ban status for United Utilities from the information we hold.

    Check the company's current advice

  • Storm overflows

    50 overflows within 10 km of CW1 centre

    Details

    925 spills in 2025

  • Lead pipes

    51% built before 1973

    Details

    Estimate, not a test. Homes in the parts of CW1 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: 50–51%. England and Wales: 61% (2026).

    Ask United Utilities for a free lead test ↗

    Lead test kits

Who supplies water in CW1

Boundary or unplaced: 9 postcodes

Drinking-water test record

United Utilities: 1,165 of 1,174 postcodes

United Utilities

United Utilities, company-wide

Regulator
DWI
Report year
2025
Failed tests
Not shown
Tests
385,673

The regulator's published total and its company rows disagree, so we don't show a count.

Failed tests by parameter
AluminiumFailed tests: 5
E. coli (confirmed)Failed tests: 4
IronFailed tests: 18
LeadFailed tests: 7
ManganeseFailed tests: 7
NickelFailed tests: 3
Total coliforms (confirmed)Failed tests: 13

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 CW1?

92% of CW1's postcodes are in the Gorsty North supply zone (United Utilities): 66 mg/l, soft.

Gorsty North · United Utilities (1,084 of 1,174 postcodes)

66 mg/l · 4.6 °Clark · 3.7 °dH · 6.6 °fH

Soft

Zone average of 51 samples.

Gorsty North (supply zone) · 12-month average, updated 25 September 2026; 51 samples

Source: United Utilities — dated 12-month average, updated 25 September 2026, read 28 September 2026

5 identified supply zones in CW1

Gorsty North · United Utilities (1,084 of 1,174 postcodes)

66 mg/l · 4.6 °Clark · 3.7 °dH · 6.6 °fH

Soft

Zone average of 51 samples.

Gorsty North (supply zone) · 12-month average, updated 25 September 2026; 51 samples

Source: United Utilities — dated 12-month average, updated 25 September 2026, read 28 September 2026

Alsager · United Utilities (16 of 1,174 postcodes)

95 mg/l · 6.7 °Clark · 5.3 °dH · 9.5 °fH

Soft

Zone average of 25 samples.

Alsager (supply zone) · 12-month average, updated 25 September 2026; 25 samples

Source: United Utilities — dated 12-month average, updated 25 September 2026, read 30 September 2026

Audlem · United Utilities (7 of 1,174 postcodes)

109 mg/l · 7.6 °Clark · 6.1 °dH · 10.9 °fH

Slightly hard

Zone average of 13 samples.

Audlem (supply zone) · 12-month average, updated 25 September 2026; 13 samples

Source: United Utilities — dated 12-month average, updated 25 September 2026, read 30 September 2026

Gorsty South · United Utilities (4 of 1,174 postcodes)

75 mg/l · 5.3 °Clark · 4.2 °dH · 7.5 °fH

Soft

Zone average of 50 samples.

Gorsty South (supply zone) · 12-month average, updated 25 September 2026; 50 samples

Source: United Utilities — dated 12-month average, updated 25 September 2026, read 28 September 2026

Malpas And Mouldsworth · United Utilities (1 of 1,174 postcodes)

16 mg/l · 1.1 °Clark · 0.9 °dH · 1.6 °fH

Soft

Zone average of 22 samples.

Malpas And Mouldsworth (supply zone) · 12-month average, updated 25 September 2026; 22 samples

Source: United Utilities — dated 12-month average, updated 25 September 2026, read 30 September 2026

53 postcodes without an identified supply zone

United Utilities (53 of 1,174 postcodes)

We do not have a verified hardness figure for this area. Ask your water company for its water quality report.

Ask your water company

Storm overflows nearby

50 overflows within 10 km of CW1 centre · 925 spills in 2025

CW1 (district) · 2025

Source: Environment Agency EDM annual return 2025 — dated 20 August 2026, read 13 October 2026

Overflows here are run by United Utilities.

46 of these were monitored for only part of 2025.

Nearest 5 shown

  1. MILL STREET CSO CREWE 169CW

    Into VALLEY BROOK · 1.1 km from the centre of CW1

    0 spills · 0 hours · Monitored 89.1% of 2025

  2. EDLESTON ROAD NO 2 CSO

    Into VALLEY BROOK · 1.1 km from the centre of CW1

    2 spills · 0.4 hours · Monitored 99.4% of 2025

  3. EDLESTON ROAD NO 2 CSO

    Into VALLEY BROOK · 1.1 km from the centre of CW1

    6 spills · 2.1 hours · Monitored 94.5% of 2025

  4. FLAG LANE N0 2 CSO 165JH

    Into VALLEY BROOK · 1.4 km from the centre of CW1

    23 spills · 14.5 hours · Monitored 100% of 2025

  5. FLAG LANE N0 2 CSO 165JH

    Into VALLEY BROOK · 1.4 km from the centre of CW1

    6 spills · 3 hours · Monitored 99.6% 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

51% built before 1973

51% of homes here were built before 1973 — estimate, not a test.

Homes in the parts of CW1 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: 50–51%. England and Wales: 61% (2026).

Older homes are more likely to have lead pipes. Only a test tells you whether yours does.

CW1 (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.

About fluoride in UK water

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

Fluoride in UK tap water

Hosepipe bans

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See our privacy policy.

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)

    reduces 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.

    View Details

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)

    reduces 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.

    View Details

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

Questions about tap water in CW1

Is the water in CW1 hard or soft?
United Utilities: soft, 66 mg/l, 4.6 °Clark, 3.7 °dH, 6.6 °fH (Gorsty North (supply zone), 12-month average, updated 25 September 2026; 51 samples). Zone average of 51 samples. United Utilities: We do not have a verified hardness figure for this area. Ask your water company for its water quality report. United Utilities: soft, 95 mg/l, 6.7 °Clark, 5.3 °dH, 9.5 °fH (Alsager (supply zone), 12-month average, updated 25 September 2026; 25 samples). Zone average of 25 samples. United Utilities: slightly hard, 109 mg/l, 7.6 °Clark, 6.1 °dH, 10.9 °fH (Audlem (supply zone), 12-month average, updated 25 September 2026; 13 samples). Zone average of 13 samples. United Utilities: soft, 75 mg/l, 5.3 °Clark, 4.2 °dH, 7.5 °fH (Gorsty South (supply zone), 12-month average, updated 25 September 2026; 50 samples). Zone average of 50 samples. United Utilities: soft, 16 mg/l, 1.1 °Clark, 0.9 °dH, 1.6 °fH (Malpas And Mouldsworth (supply zone), 12-month average, updated 25 September 2026; 22 samples). Zone average of 22 samples.
What does the drinking water regulator's record show for CW1?
United Utilities: at least 57 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 CW1 have lead pipes?
51% of homes here were built before 1973 — estimate, not a test. Homes in the parts of CW1 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: 50–51%. 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 CW1 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

United Utilities contact page, United Utilities, United Utilities, United Utilities, United Utilities, United Utilities: 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

Check another postcode

By TapWaterData Editorial

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