Darlington, England
Darlington
Your water is safe
We checked 20 things and found nothing to worry about
ExcellentYour water is safe
We checked 20 things and found nothing to worry about
ExcellentBased on drinking water tests, your water in TS21 (Darlington) is supplied by Northumbrian Water. Based on the latest data (last sampled 2024-12-19), 20 things were tested with 0 exceeding recommended levels. The overall water quality score for TS21 is 9.7/10.
Last sampled 2024-12-19 · 2,827 samples
This data is 15 months old. Newer data may be available soon.
Results from drinking water tests in Darlington.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Colour | 0.81 mg/L Pt/Co | 20 mg/L Pt/Co | — | Safe |
| Iron | 0.019 mg/L | 0.2 mg/L | 0.3 mg/L | Safe |
| Aluminium | 0.031 mg/L | 0.2 mg/L | — | Safe |
| Conductivity | 260 µS/cm | — | — | Safe |
| Manganese | 0.00065 mg/L | 0.05 mg/L | 0.08 mg/L | Safe |
| pH | 7.8 pH | — | — | Safe |
Source: Stream Water Data Portal
General-purpose filters for common UK tap water concerns.

Our pick for TS21
BRITA Marella XL + MAXTRA PRO
Jug Filter · TUV SUD
A solid all-round filter for TS21. Removes Chlorine, Lead, Copper and more. No installation needed.
£25
Recommendations matched to your area's water data, not sponsorship. We may earn a commission at no extra cost to you. Affiliate disclosure · Full filter guide
Rivers, groundwater and reservoirs near TS21. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 7.92 pH | — | — | Safe |
| Temperature | 4.3 °C | — | — | Safe |
| Ammonia | 0.032 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 8.01 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.018 mg/L | 0.5 mg/L | 3 mg/L | Safe |
| Phosphate | 0.143 mg/L | — | — | Safe |
Source: Environment Agency
We'll email you when water quality data changes for TS21.