Hounslow, England
Hounslow
Your water is safe
We checked 10 things and found nothing to worry about
GoodYour water is safe
We checked 10 things and found nothing to worry about
GoodBased on environmental water monitoring, your water in TW1 (Hounslow) is supplied by Thames Water. Based on the latest data (last sampled 2000-07-14), 10 things were tested with 0 exceeding recommended levels. The overall water quality score for TW1 is 8.4/10.
Last sampled 2000-07-14 · Tap water tests not yet available for Thames Water
This data is over 26 years old. The Environment Agency hasn't sampled near TW1 recently. Scores reflect the most recent available data.
Here’s what government tests found in water near you.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Lead | 0.0052 mg/L | 0.01 mg/L | 0.01 mg/L | Safe |
| pH | 7.8 pH | — | — | Safe |
| Temperature | 16 °C | — | — | Safe |
| Ammonia | 0.19 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 2.2 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.117 mg/L | 0.5 mg/L | 3 mg/L | Safe |
Source: Environment Agency
General-purpose filters for common UK tap water concerns.

Our pick for TW1
BRITA Marella XL + MAXTRA PRO
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A solid all-round filter for TW1. Removes Chlorine, Lead, Copper and more. No installation needed.
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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 TW1. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Lead | 0.0052 mg/L | 0.01 mg/L | 0.01 mg/L | Safe |
| pH | 7.8 pH | — | — | Safe |
| Temperature | 16 °C | — | — | Safe |
| Ammonia | 0.19 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 2.2 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.117 mg/L | 0.5 mg/L | 3 mg/L | Safe |
Source: Environment Agency
We'll email you when water quality data changes for TW1.