Test Valley, England
Your water in SO21
Test Valley
Your water is safe
We checked 20 things and found 1 worth knowing about
ExcellentYour water is safe
We checked 20 things and found 1 worth knowing about
ExcellentBased on drinking water tests, your water in SO21 (Test Valley) is supplied by Southern Water. Based on the latest data (last sampled 2025-12-03), 20 things were tested with 1 exceeding recommended levels. The overall water quality score for SO21 is 9.2/10.
Drinking water testsHow we score
Last sampled 2025-12-03 · 672 samples
What’s in your tap water
Results from drinking water tests in Test Valley.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Nitrate | 42 mg/L | 50 mg/L | 50 mg/L | Watch |
Source: Stream Water Data Portal
What removes these from your water
1 contaminant flagged in SO21. These filters are matched to what was found in your water.
Our pick for SO21
Waterdrop G3P600 Reverse Osmosis
Under-Sink · NSF/ANSI 58, NSF/ANSI 372
The Waterdrop G3P600 Reverse Osmosis is certified to remove Nitrate, which was flagged in SO21. Fits under your kitchen sink for filtered water on tap.
Removes from your water
Nitrate
Check price & reviews
£399
4.6/5
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 SO21. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 7.9 pH | — | — | Safe |
| Conductivity | 610 µS/cm | — | — | Safe |
| Temperature | 6 °C | — | — | Safe |
| Ammonia | 0.07 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 6.22 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.024 mg/L | 0.5 mg/L | 3 mg/L | Safe |
Source: Environment Agency
Get alerts for your area
We'll email you when water quality data changes for SO21.