Skip to main content
Waterd — free hydration appGet
💧 TapWaterData
Choose a country: United Kingdom
Menu
Regulator record

SY10 tap water: what's in it?

Severn Trent Water: at least 40 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.

SY10 tap water quality report · 2026

  • Hardness

    Hard

    Details

    Ruyton XI Towns (supply zone) · 1 August 2025 to 31 July 2026

  • Hosepipe ban

    Not available

    Details

    We can't confirm the hosepipe-ban status for Severn Trent Water from the information we hold.

    Check the company's current advice

  • Storm overflows

    17 overflows within 10 km of SY10 centre

    Details

    254 spills in 2025

  • Lead pipes

    61% built before 1973

    Details

    Estimate, not a test. Homes in the parts of SY10 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: 58–61%. England and Wales: 61% (2026).

    Ask Severn Trent Water for a free lead test ↗

    Lead test kits

Who supplies water in SY10

Boundary or unplaced: 2 postcodes

Drinking-water test record

Severn Trent Water: 607 of 835 postcodes

Severn Trent Water

Severn Trent Water, company-wide

Regulator
DWI
Report year
2025
Failed tests
Not shown
Tests
452,303

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

Failed tests by parameter
Benzo[a]Pyrene (total)Failed tests: 1
E. coli (confirmed)Failed tests: 3
IronFailed tests: 15
LeadFailed tests: 4
ManganeseFailed tests: 2
NickelFailed tests: 6
Total coliforms (confirmed)Failed tests: 8
Turbidity – indicatorFailed tests: 1

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

Hafren Dyfrdwy: 226 of 835 postcodes

Hafren Dyfrdwy

Hafren Dyfrdwy, company-wide

Regulator
DWI
Report year
2025
Failed tests
Not shown
Tests
Not given in the report

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

Failed tests by parameter
Coliform bacteria (indicator)Failed tests: 9
ColourFailed tests: 1
Total coliforms (confirmed)Failed tests: 1
Turbidity – indicatorFailed tests: 1

Source: DWI wales 2025, Annex B — dated 14 July 2026, read 13 October 2026

Source: DWI wales 2025, Annex A — dated 14 July 2026, read 13 October 2026

Wales: 99.97% of tests met standards in 2025 (DWI).

Source: DWI wales 2025, national compliance — dated 9 July 2026, read 13 October 2026

How hard is the water in SY10?

Across SY10's supply zones, hardness ranges from 72 mg/l (soft) to 274 mg/l (hard). Those 8 zones cover 94% of its postcodes.

8 identified supply zones in SY10

Ruyton XI Towns · Severn Trent Water (251 of 835 postcodes)

262 mg/l · 18.4 °Clark · 14.7 °dH · 26.2 °fH

Hard

Typical value.

Ruyton XI Towns (supply zone) · 1 August 2025 to 31 July 2026

Source: Severn Trent Water — dated 1 August 2025 to 31 July 2026, read 30 September 2026

Pant · Hafren Dyfrdwy (201 of 835 postcodes)

217 mg/l · 15.2 °Clark · 12.2 °dH · 21.7 °fH

Hard

Typical value.

Pant (supply zone) · 1 August 2025 to 31 July 2026

Source: Hafren Dyfrdwy — dated 1 August 2025 to 31 July 2026, read 1 October 2026

Weston Rhyn · Severn Trent Water (196 of 835 postcodes)

239 mg/l · 16.8 °Clark · 13.4 °dH · 23.9 °fH

Hard

Typical value.

Weston Rhyn (supply zone) · 1 August 2025 to 31 July 2026

Source: Severn Trent Water — dated 1 August 2025 to 31 July 2026, read 30 September 2026

Oswestry · Severn Trent Water (70 of 835 postcodes)

245 mg/l · 17.2 °Clark · 13.7 °dH · 24.5 °fH

Hard

Typical value.

Oswestry (supply zone) · 1 August 2025 to 31 July 2026

Source: Severn Trent Water — dated 1 August 2025 to 31 July 2026, read 30 September 2026

Llynclys · Severn Trent Water (43 of 835 postcodes)

219 mg/l · 15.4 °Clark · 12.3 °dH · 21.9 °fH

Hard

Typical value.

Llynclys (supply zone) · 1 August 2025 to 31 July 2026

Source: Severn Trent Water — dated 1 August 2025 to 31 July 2026, read 30 September 2026

Mardy · Hafren Dyfrdwy (10 of 835 postcodes)

223 mg/l · 15.6 °Clark · 12.5 °dH · 22.3 °fH

Hard

Typical value.

Mardy (supply zone) · 1 August 2025 to 31 July 2026

Source: Hafren Dyfrdwy — dated 1 August 2025 to 31 July 2026, read 1 October 2026

Glyndwr South · Hafren Dyfrdwy (7 of 835 postcodes)

72 mg/l · 5.1 °Clark · 4.0 °dH · 7.2 °fH

Soft

Typical value.

Glyndwr South (supply zone) · 1 August 2025 to 31 July 2026

Source: Hafren Dyfrdwy — dated 1 August 2025 to 31 July 2026, read 1 October 2026

Ellesmere · Severn Trent Water (4 of 835 postcodes)

274 mg/l · 19.2 °Clark · 15.3 °dH · 27.4 °fH

Hard

Typical value.

Ellesmere (supply zone) · 1 August 2025 to 31 July 2026

Source: Severn Trent Water — dated 1 August 2025 to 31 July 2026, read 30 September 2026

51 postcodes without an identified supply zone

Severn Trent Water (43 of 835 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

Hafren Dyfrdwy (8 of 835 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

17 overflows within 10 km of SY10 centre · 254 spills in 2025

SY10 (district) · 2025

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

Overflows here are run by Dwr Cymru Welsh Water, Hafren Dyfrdwy and Severn Trent Water.

16 of these were monitored for only part of 2025.

Nearest 5 shown

  1. LLANSILIN - MALTHOUSE COTTAGE (CSO)

    Receiving water not named in the return · 3.1 km from the centre of SY10

    1 spill · 0.6 hours · Monitored 98.6% of 2025

  2. Llansilin Wastewater Treatment Works

    Receiving water not named in the return · 3.1 km from the centre of SY10

    14 spills · 14.7 hours · Monitored 99% of 2025

  3. WESTON LANE MORDA CSO

    Into RIVER MORDA · 4.9 km from the centre of SY10

    13 spills · 113.3 hours · Monitored 97.8% of 2025

  4. MILE OAK STW

    Into RIVER MORDA · 5.5 km from the centre of SY10

    40 spills · 301.8 hours · Monitored 99.7% of 2025

  5. SMITHFIELD MARKET CAR PARK CSO

    Into OSWESTRY BROOK · 5.5 km from the centre of SY10

    35 spills · 64.3 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

61% built before 1973

61% of homes here were built before 1973 — estimate, not a test.

Homes in the parts of SY10 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: 58–61%. England and Wales: 61% (2026).

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

SY10 (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

Get UK hosepipe news

Occasional news on UK hosepipe bans and water restrictions from TapWaterData. Unsubscribe any time.

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 water softener for UK buyers yet.

What a pick has to pass:

  • An exact-model listing from NSF, WQA or IAPMO for the model sold in the UK
  • Listed to NSF/ANSI 44, the water softener standard
  • The manufacturer's documented feed connection and water-pressure range, so a plumber can check them against UK pipework
  • UK availability evidenced by Amazon UK, the manufacturer or a UK retailer, checked in the last 90 days

Until we can recommend one, see what a softener costs to buy, fit and run in the UK. Water softener cost

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 SY10

Is the water in SY10 hard or soft?
Severn Trent Water: hard, 262 mg/l, 18.4 °Clark, 14.7 °dH, 26.2 °fH (Ruyton XI Towns (supply zone), 1 August 2025 to 31 July 2026). Typical value. Hafren Dyfrdwy: hard, 217 mg/l, 15.2 °Clark, 12.2 °dH, 21.7 °fH (Pant (supply zone), 1 August 2025 to 31 July 2026). Typical value. Severn Trent Water: hard, 239 mg/l, 16.8 °Clark, 13.4 °dH, 23.9 °fH (Weston Rhyn (supply zone), 1 August 2025 to 31 July 2026). Typical value. Severn Trent Water: hard, 245 mg/l, 17.2 °Clark, 13.7 °dH, 24.5 °fH (Oswestry (supply zone), 1 August 2025 to 31 July 2026). Typical value. Severn Trent Water: hard, 219 mg/l, 15.4 °Clark, 12.3 °dH, 21.9 °fH (Llynclys (supply zone), 1 August 2025 to 31 July 2026). Typical value. Severn Trent Water: We do not have a verified hardness figure for this area. Ask your water company for its water quality report. Hafren Dyfrdwy: hard, 223 mg/l, 15.6 °Clark, 12.5 °dH, 22.3 °fH (Mardy (supply zone), 1 August 2025 to 31 July 2026). Typical value. Hafren Dyfrdwy: We do not have a verified hardness figure for this area. Ask your water company for its water quality report. Hafren Dyfrdwy: soft, 72 mg/l, 5.1 °Clark, 4.0 °dH, 7.2 °fH (Glyndwr South (supply zone), 1 August 2025 to 31 July 2026). Typical value. Severn Trent Water: hard, 274 mg/l, 19.2 °Clark, 15.3 °dH, 27.4 °fH (Ellesmere (supply zone), 1 August 2025 to 31 July 2026). Typical value.
What does the drinking water regulator's record show for SY10?
Severn Trent Water: at least 40 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 SY10 have lead pipes?
61% of homes here were built before 1973 — estimate, not a test. Homes in the parts of SY10 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: 58–61%. 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 SY10 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

Severn Trent Water contact page, Hafren Dyfrdwy contact page, Severn Trent Water, Hafren Dyfrdwy, Severn Trent Water, Severn Trent Water, Severn Trent Water, Hafren Dyfrdwy, Hafren Dyfrdwy, Severn Trent 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

Check another postcode

By TapWaterData Editorial

Get the Weekly Water Brief

One email a week on water testing, treatment, and what water-quality data means for your home.

One email a week. Unsubscribe anytime.