Westminster, England
Your water in W9
Westminster, Westminster
Your water is safe
We checked 8 things and found 1 worth knowing about
Good8
Tests run
1
To watch
Thames Water
Your water company
Apr 2026
Last checked
Based on government water tests, your water in W9 (Westminster) is supplied by Thames Water. Based on the latest data (last sampled 2001-01-21), 8 parameters were tested with 1 exceeding recommended levels. The overall water quality score for W9 is 7.6/10.
What we found
Here's what government tests found in water near you.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Coliform bacteria Source: Environment Agency | 72 count/100ml | 0 count/100ml | 0 count/100ml | Over limit |
| pH Source: Environment Agency | 7.9 pH | — | — | Safe |
| Temperature Source: Environment Agency | 4.6 °C | — | — | Safe |
| Ammonia Source: Environment Agency | 0.062 mg/L | 0.5 mg/L | — | Safe |
| Nitrate Source: Environment Agency | 0.191 mg/L | 50 mg/L | 50 mg/L | Safe |
| Phosphate Source: Environment Agency | 0.17 mg/L | — | — | Safe |
| Dissolved Oxygen Source: Environment Agency | 97.5 mg/L | — | — | Safe |
| Nitrite Source: Environment Agency | 0.0086 mg/L | 0.5 mg/L | 3 mg/L | Safe |
How it's changed
W9quality score, 2020–2026
Water quality has improved over the past 6 years.
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Filters for your area
Picked to match what we found in your water
BRITA
MAXTRA PRO All-in-1
Filter Jug
Removes
- Chlorine
- Lead
- Copper
+1 more
ZeroWater
Ready-Pour 10-Cup
Filter Jug
Removes
- Pfas
- Lead
- Chlorine
+2 more
Osmio
Zero Installation Reverse Osmosis
Countertop
Removes
- Pfas
- Lead
- Nitrate
+4 more
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