Tap water in TR1, CornwallLead is over the limit.
Supplied by South West Water. 692 samples, 15 substances, latest on 12 December 2025. Lead came in above the legal limit. Everything else passed.
8.3 / 10
The tank is as full as the score.
What to do about it
Waterdrop G3P600 Reverse Osmosis
£550typical price
Removes lead, the result that stood out in TR1.
Osmio PRO-III Ultimate Whole House
£499typical price
Removes lead, the result that stood out in TR1.
Doulton HIP Ultracarb
£120typical price
Removes lead, the result that stood out in TR1.
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What's in a glass of TR1 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.
Lead is over its legal limit, at 241% of it.
- Lead241%
- Nickel17%
- Aluminium13%
- Colour10%
- Nitrate10%
- Arsenic6%
- Iron4%
- Turbidity3%
- Selenium3%
- Manganese3%
- Antimony2%
- Chromium2%
- Cadmium1%
- Copper<1%
- pH 7.5 pH
All 15 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Lead | 0.0241 mg/L | 0.01 mg/L | 241% |
| Aluminium | 0.0257 mg/L | 0.2 mg/L | 13% |
| Colour | 2 mg/L Pt/Co | 20 mg/L Pt/Co | 10% |
| Iron | 0.00893 mg/L | 0.2 mg/L | 4% |
| Manganese | 0.00142 mg/L | 0.05 mg/L | 3% |
| pH | 7.5 pH | No legal limit | – |
| Turbidity | 0.13 NTU | 4 NTU | 3% |
| Copper | 0.0025 mg/L | 2 mg/L | <1% |
| Nickel | 0.0033 mg/L | 0.02 mg/L | 17% |
| Antimony | 0.00012 mg/L | 0.005 mg/L | 2% |
| Arsenic | 0.00062 mg/L | 0.01 mg/L | 6% |
| Cadmium | 0.00006 mg/L | 0.005 mg/L | 1% |
| Chromium | 0.0008 mg/L | 0.05 mg/L | 2% |
| Nitrate | 5 mg/L | 50 mg/L | 10% |
| Selenium | 0.0012 mg/L | 0.04 mg/L | 3% |
Your river is the Kenwyn, rated moderate
The Environment Agency rated the Kenwyn as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by water plants and algae. 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. Its ecological rating has dropped since the previous assessment.
None of this is a test of your tap water. Environment Agency record · River health across England
TR1 in short
Tap water in TR1 (Cornwall) is supplied by South West Water in the Cornwall Central zone and scores 8.3 out of 10, against an England and Wales average of 9.0. 1 of 15 tested substances was close to or over a limit. The latest sample is from 12 December 2025.
- Lead was measured at 0.024 mg/L, 2.4 times the UK limitIt is the only one of 15 tested substances to go over its limit. See the full results
- The lowest score of the 45 areas tested in CornwallTR1 scores 8.3 out of 10. The best in Cornwall, EX23, scores 9.5.
- Every one of the 10 neighbouring districts scores higherEX23 next door scores 9.5, against 8.3 here. Supply zones, not distance, explain the gap. See EX23
Questions about TR1 water
Is TR1 tap water safe to drink?
Based on the latest tests, TR1 (Cornwall) water scores 8.3/10, which is safe. 1 of 15 tested contaminants exceeded recommended levels. Water is supplied by South West Water.
What contaminants are in TR1 water?
We tested 15 contaminants in TR1 water. 1 were flagged, including Lead.
Who supplies water in TR1?
TR1 (Cornwall) is supplied by South West Water. You can view their full profile and compliance data on our supplier page.
Should I use a water filter in TR1?
With 1 contaminant above recommended levels in TR1, 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 TR1 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for TR1, 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 TR1?
The Environment Agency rated the Kenwyn as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by water plants and algae. 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. Its ecological rating has dropped since the previous assessment. This is a rating of the river, not of tap water in TR1, which is treated before it reaches homes.
Keep reading
- Lead Pipes in the UKHow to check for lead pipes and reduce exposure
- Best Water Filters UKEvery filter type compared on what it actually removes
- Is UK Tap Water Safe?Everything you need to know about tap water safety in the UK
- How to Test Your Tap WaterFrom DIY strips to professional lab analysis
Lead in waterHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near TR1
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 TR1.