Hertsmere, England
Hertsmere
Your water is safe
We checked 11 things and found nothing to worry about
ExcellentYour water is safe
We checked 11 things and found nothing to worry about
ExcellentBased on environmental water monitoring, your water in EN6 (Hertsmere) is supplied by Thames Water. Based on the latest data (last sampled 2000-03-14), 11 things were tested with 0 exceeding recommended levels. The overall water quality score for EN6 is 9.3/10.
Last sampled 2000-03-14 · Tap water tests not yet available for Thames Water
This data is over 26 years old. The Environment Agency hasn't sampled near EN6 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 | 0.0026 mg/L | 0.01 mg/L | 0.01 mg/L | Safe |
| pH | 8 pH | — | — | Safe |
| Temperature | 4.1 °C | — | — | Safe |
| Mercury | 0.00001 mg/L | 0.001 mg/L | 0.006 mg/L | Safe |
| Cadmium | 0.0001 mg/L | 0.005 mg/L | 0.003 mg/L | Safe |
| Ammonia | 0.01 mg/L | 0.5 mg/L | — | Safe |
Source: Environment Agency
General-purpose filters for common UK tap water concerns.

Our pick for EN6
BRITA Marella XL + MAXTRA PRO
Jug Filter · TUV SUD
A solid all-round filter for EN6. 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 EN6. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Lead | 0.0026 mg/L | 0.01 mg/L | 0.01 mg/L | Safe |
| pH | 8 pH | — | — | Safe |
| Temperature | 4.1 °C | — | — | Safe |
| Mercury | 0.00001 mg/L | 0.001 mg/L | 0.006 mg/L | Safe |
| Cadmium | 0.0001 mg/L | 0.005 mg/L | 0.003 mg/L | Safe |
| Ammonia | 0.01 mg/L | 0.5 mg/L | — | Safe |
Source: Environment Agency
We'll email you when water quality data changes for EN6.