Hertsmere, England
Hertsmere
Your water is safe
We checked 12 things and found nothing to worry about
ExcellentYour water is safe
We checked 12 things and found nothing to worry about
ExcellentBased on environmental water monitoring, your water in AL2 (Hertsmere) is supplied by Thames Water. Based on the latest data (last sampled 2024-01-03), 12 things were tested with 0 exceeding recommended levels. The overall water quality score for AL2 is 9.6/10.
Last sampled 2024-01-03 · Tap water tests not yet available for Thames Water
This data is over 2 years old. The Environment Agency hasn't sampled near AL2 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 |
|---|---|---|---|---|
| pH | 8 pH | — | — | Safe |
| Temperature | 6.98 °C | — | — | Safe |
| Ammonia | 0.048 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 5.59 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.03 mg/L | 0.5 mg/L | 3 mg/L | Safe |
| Phosphate | 0.068 mg/L | — | — | Safe |
Source: Environment Agency
General-purpose filters for common UK tap water concerns.

Our pick for AL2
BRITA Marella XL + MAXTRA PRO
Jug Filter · TUV SUD
A solid all-round filter for AL2. 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 AL2. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 8 pH | — | — | Safe |
| Temperature | 6.98 °C | — | — | Safe |
| Ammonia | 0.048 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 5.59 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.03 mg/L | 0.5 mg/L | 3 mg/L | Safe |
| Phosphate | 0.068 mg/L | — | — | Safe |
Source: Environment Agency
We'll email you when water quality data changes for AL2.