Loading water report
Fetching the latest data for this area
Loading water report
Fetching the latest data for this area
Kingston upon Thames, England
Kingston upon Thames
Your water is safe
We checked 22 things and found 2 worth knowing about
GoodYour water is safe
We checked 22 things and found 2 worth knowing about
GoodTap water in SW20 (Kingston upon Thames, Kingston upon Thames) is supplied by Thames Water and scored 8 out of 10 for safety based on 22 tested parameters. 2 contaminants exceeded recommended safe levels: Coliform Bacteria, Nitrite. Data is from 3,135 samples collected up to 2025-12-31, sourced from Thames Water via the Stream Water Data Portal.
Last sampled 2025-12-31 · 3,135 samples
Results from drinking water tests in Kingston upon Thames.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Coliform Bacteria | 1 count/100ml | 0 count/100ml | 0 count/100ml | Over limit |
| Nitrite | 0.6 mg/L | 0.5 mg/L | 3 mg/L | Over limit |
Source: Stream Water Data Portal
Shower filters
Remove chlorine for better skin and hair
Test your water
Confirm exactly what's in your pipes
Learn more about the water quality issues relevant to this area.
Rivers, groundwater and reservoirs near SW20. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 7.8 pH | — | — | Safe |
| Temperature | 10 °C | — | — | Safe |
| Ammonia | 0.207 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 6.47 mg/L | 50 mg/L | 50 mg/L | Safe |
| Phosphate | 2.22 mg/L | — | — | Safe |
| Dissolved Oxygen | 8.79 mg/L | — | — | Safe |
Source: Environment Agency
We'll email you when water quality data changes for SW20.