Welwyn Hatfield, England
Your water in AL7
Welwyn Hatfield
Your water is safe
We checked 12 things and found nothing to worry about
GoodYour water is safe
We checked 12 things and found nothing to worry about
GoodBased on environmental water monitoring, your water in AL7 (Welwyn Hatfield) is supplied by Thames Water. Based on the latest data (last sampled 2025-04-04), 12 things were tested with 0 exceeding recommended levels. The overall water quality score for AL7 is 8.5/10.
Environmental monitoringHow we score
Last sampled 2025-04-04 · Tap water tests not yet available for Thames Water
What we found
Here’s what government tests found in water near you.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 7.8 pH | — | — | Safe |
| Temperature | 7 °C | — | — | Safe |
| Ammonia | 0.361 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 7.19 mg/L | 50 mg/L | 50 mg/L | Safe |
| Phosphate | 0.13 mg/L | — | — | Safe |
| Dissolved Oxygen | 12 mg/L | — | — | Safe |
Source: Environment Agency
Filters for AL7
General-purpose filters for common UK tap water concerns.
Our pick for AL7
BRITA Marella XL + MAXTRA PRO
Jug Filter · TUV SUD
A solid all-round filter for AL7. Removes Chlorine, Lead, Copper and more. No installation needed.
Check price & reviews
£25
4.5/5
2 more options
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
Environmental water nearby
Rivers, groundwater and reservoirs near AL7. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 7.8 pH | — | — | Safe |
| Temperature | 7 °C | — | — | Safe |
| Ammonia | 0.361 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 7.19 mg/L | 50 mg/L | 50 mg/L | Safe |
| Phosphate | 0.13 mg/L | — | — | Safe |
| Dissolved Oxygen | 12 mg/L | — | — | Safe |
Source: Environment Agency
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