Sefton, England
Sefton
Your water is safe
We checked 16 things and found nothing to worry about
ExcellentYour water is safe
We checked 16 things and found nothing to worry about
ExcellentBased on drinking water tests, your water in L20 (Sefton) is supplied by United Utilities. Based on the latest data (last sampled 2024-12-30), 16 things were tested with 0 exceeding recommended levels. The overall water quality score for L20 is 9.2/10.
Last sampled 2024-12-30 · 2,988 samples
This data is 15 months old. Newer data may be available soon.
Results from drinking water tests in Sefton.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Turbidity | 0.1 NTU | 4 NTU | 4 NTU | Safe |
| Aluminium | 0.00622 mg/L | 0.2 mg/L | — | Safe |
| Iron | 0.017 mg/L | 0.2 mg/L | 0.3 mg/L | Safe |
| Manganese | 0.00103 mg/L | 0.05 mg/L | 0.08 mg/L | Safe |
| Copper | 0.0000512 mg/L | 2 mg/L | 2 mg/L | Safe |
| Nickel | 0.00212 mg/L | 0.02 mg/L | 0.07 mg/L | Safe |
Source: Stream Water Data Portal
General-purpose filters for common UK tap water concerns.

Our pick for L20
BRITA Marella XL + MAXTRA PRO
Jug Filter · TUV SUD
A solid all-round filter for L20. 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 L20. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Lead | 0.0202 mg/L | 0.01 mg/L | 0.01 mg/L | Over limit |
| Manganese | 0.062 mg/L | 0.05 mg/L | 0.08 mg/L | Over limit |
| Iron | 0.309 mg/L | 0.2 mg/L | 0.3 mg/L | Over limit |
| Aluminium | 0.235 mg/L | 0.2 mg/L | — | Over limit |
Source: Environment Agency
We'll email you when water quality data changes for L20.