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Test Valley, England
Test Valley
Your water is safe
We checked 20 things and found 1 worth knowing about
GoodYour water is safe
We checked 20 things and found 1 worth knowing about
GoodTap water in SO16 (Test Valley, Test Valley) is supplied by Southern Water and scored 8.9 out of 10 for safety based on 20 tested parameters. 1 contaminant exceeded recommended safe levels: Nitrate. Data is from 706 samples collected up to 2025-12-03, sourced from Southern Water via the Stream Water Data Portal.
Last sampled 2025-12-03 · 706 samples
Results from drinking water tests in Test Valley.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Nitrate | 38 mg/L | 50 mg/L | 50 mg/L | Watch |
Source: Stream Water Data Portal
1 contaminant flagged in SO16. These filters are matched to what was found in your water.

Our pick for SO16
Waterdrop G3P600 Reverse Osmosis
Reverse Osmosis · NSF/ANSI 58, NSF/ANSI 372
The Waterdrop G3P600 Reverse Osmosis is certified to remove Nitrate, which was flagged in SO16. Fits under your kitchen sink for filtered water on tap.
Removes from your water
£399
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
Shower filters
Remove chlorine for better skin and hair
Test your water
Confirm exactly what's in your pipes
Learn more about the water quality issues relevant to this area.
Rivers, groundwater and reservoirs near SO16. This is environmental monitoring — not your tap water.
We'll email you when water quality data changes for SO16.