Tap water in PO30, Isle of WightSafe to drink.
Supplied by Southern Water. 32,184 samples, 22 substances, latest on 29 April 2026. Everything is inside the legal limit. One result, nitrate, sits close to the line.
9.2 / 10
The tank is as full as the score.
What to do about it
Waterdrop G3P600 Reverse Osmosis
£550typical price
Removes nitrate, the result that stood out in PO30.
Osmio PRO-III Ultimate Whole House
£499typical price
Removes nitrate, the result that stood out in PO30.
ZeroWater 12-Cup Ready-Pour
£40typical price
Removes nitrate, the result that stood out in PO30.
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What's in a glass of PO30 water
Every bubble is a substance the lab measured. The higher it floats, the closer it came to its legal limit, the dashed line at the top.
Nitrate came closest to a limit, at 77% of it. 16 of 18 substances used under a quarter of theirs.
- Nitrate77%
- Trihalomethanes26%
- Nickel20%
- Colour15%
- Ammonia8%
- Iron7%
- Bromate6%
- Aluminium6%
- Manganese4%
- Turbidity3%
- Nitrite2%
- Antimony1%
- Arsenic1%
- Selenium1%
- Lead<1%
- Copper<1%
- Cadmium<1%
- Chromium<1%
- Coliform Bacteria none found
- E. coli none found
- Conductivity 554 µS/cm
- pH 7.6 pH
All 22 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Nitrate | 38.4 mg/L | 50 mg/L | 77% |
| Turbidity | 0.13 NTU | 4 NTU | 3% |
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
| E. coli | 0 count/100ml | Must be zero | None found |
| Colour | 3 mg/L Pt/Co | 20 mg/L Pt/Co | 15% |
| Aluminium | 0.0113 mg/L | 0.2 mg/L | 6% |
| Iron | 0.0136 mg/L | 0.2 mg/L | 7% |
| Manganese | 0.00178 mg/L | 0.05 mg/L | 4% |
| Lead | 0.00009 mg/L | 0.01 mg/L | <1% |
| Conductivity | 554 µS/cm | No legal limit | – |
| pH | 7.6 pH | No legal limit | – |
| Trihalomethanes | 0.0257 mg/L | 0.1 mg/L | 26% |
| Bromate | 0.00058 mg/L | 0.01 mg/L | 6% |
| Nitrite | 0.009 mg/L | 0.5 mg/L | 2% |
| Ammonia | 0.039 mg/L | 0.5 mg/L | 8% |
| Copper | 0.0162 mg/L | 2 mg/L | <1% |
| Arsenic | 0.00012 mg/L | 0.01 mg/L | 1% |
| Cadmium | 0.000031 mg/L | 0.005 mg/L | <1% |
| Chromium | 0.00019 mg/L | 0.05 mg/L | <1% |
| Nickel | 0.00396 mg/L | 0.02 mg/L | 20% |
| Antimony | 0.000064 mg/L | 0.005 mg/L | 1% |
| Selenium | 0.00043 mg/L | 0.04 mg/L | 1% |
Your river is the Lukely Brook, rated moderate
The Environment Agency rated the Lukely Brook as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants.
None of this is a test of your tap water. Environment Agency record · River health across England
PO30 in short
Tap water in PO30 (Isle of Wight) is supplied by Southern Water in the Isle of Wight Central zone and scores 9.2 out of 10, against an England and Wales average of 9.0. 1 of 22 tested substances was close to or over a limit. The latest sample is from 29 April 2026.
- Nitrate is within its legal limit but flagged, at 77% of the 50 mg/L maximumAnything over three quarters of a limit is flagged here as worth watching. It has not gone over. See every reading
- 6th cleanest of 12 areas tested in Isle of WightSquarely mid-table for Isle of Wight, between PO31 on 9.3 and PO39 on 9.1.
- Scores higher than 2 of 10 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.
Questions about PO30 water
Is PO30 tap water safe to drink?
Based on the latest tests, PO30 (Isle of Wight) water scores 9.2/10, which is safe. 1 of 22 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.
What contaminants are in PO30 water?
We tested 22 contaminants in PO30 water. 1 were flagged, including Nitrate.
Who supplies water in PO30?
PO30 (Isle of Wight) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.
Should I use a water filter in PO30?
With 1 contaminant above recommended levels in PO30, a water filter could help. A filter jug or under-sink filter can reduce most common contaminants. See our filter recommendations for your area.
Are there PFAS forever chemicals in PO30 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for PO30, and the Environment Agency has no PFAS detections in rivers or groundwater within 10 km of it. That reflects where sampling has happened as much as the water itself.
How clean is the river near PO30?
The Environment Agency rated the Lukely Brook as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants. This is a rating of the river, not of tap water in PO30, which is treated before it reaches homes.
Keep reading
- Best Water Filters UKEvery filter type compared on what it actually removes
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- How to Test Your Tap WaterFrom DIY strips to professional lab analysis
- Best Water Filter Jug UKBRITA vs ZeroWater vs the rest, tested against real data
Nitrate levelsHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near PO30
Environment Agency samples from rivers, groundwater and reservoirs nearby. Not your tap water. For scale they are shown against drinking water limits; rivers are judged against much stricter environmental standards, and on those every river in England fails for chemicals.
Get alerts for your area
We'll email you when water quality data changes for PO30.