Tap water in PL7, PlymouthSafe to drink.Soft.
Supplied by South West Water. 1,177 samples, 16 substances, latest on 18 December 2025. Everything is inside the legal limit, and nothing comes close to it.
9.5 / 10
The tank is as full as the score. The specks are the minerals that make water hard.
What to do about it
ZeroWater 12-Cup Ready-Pour
£40typical price
Households concerned about PFAS and heavy metals
Waterdrop 10UA Under Sink
£70typical price
High-volume under-sink filtration without RO complexity
BRITA Marella XL + MAXTRA PRO
£25typical price
Basic chlorine and taste improvement on a budget
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What's in a glass of PL7 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.
Aluminium came closest to a limit, at 17% of it. 15 of 15 substances used under a quarter of theirs.
- Aluminium17%
- Nickel17%
- Colour10%
- Nitrate10%
- Arsenic6%
- Iron4%
- Turbidity3%
- Selenium3%
- Manganese2%
- Antimony2%
- Chromium2%
- Bromate1%
- Cadmium1%
- Lead1%
- Copper<1%
- pH 7.8 pH
All 16 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Aluminium | 0.0338 mg/L | 0.2 mg/L | 17% |
| Colour | 2 mg/L Pt/Co | 20 mg/L Pt/Co | 10% |
| Iron | 0.0076 mg/L | 0.2 mg/L | 4% |
| Manganese | 0.00101 mg/L | 0.05 mg/L | 2% |
| pH | 7.8 pH | No legal limit | – |
| Turbidity | 0.13 NTU | 4 NTU | 3% |
| Bromate | 0.000132 mg/L | 0.01 mg/L | 1% |
| Antimony | 0.0001 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% |
| Copper | 0.00492 mg/L | 2 mg/L | <1% |
| Lead | 0.0001 mg/L | 0.01 mg/L | 1% |
| Nickel | 0.0033 mg/L | 0.02 mg/L | 17% |
28mg of limescale minerals in every litre, typical for the PL area. PL7 has no reading of its own.
Soft water. Kind to kettles, boilers and skin
You will not need a softener here, and you will use less soap and detergent than most of England.
Your river is the Tory Brook, rated moderate
The Environment Agency rated the Tory 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
104
forever-chemical detections in nearby rivers and groundwater
At 4 sites. The highest was 6:2 FTSA at 0.063 µg/L, at Plymouth Garden Centre Crownhill Plymouth Pipe Entering Storage Tank, 5.3 km away, in March 2025. These are river and borehole samples, not tests of your tap water.
Every PFAS sample around Plymouth · Which filters remove PFAS · PFAS explained
PL7 in short
Tap water in PL7 (Plymouth) is supplied by South West Water in the Plymouth Central zone and scores 9.5 out of 10, against an England and Wales average of 9.0. None of the 16 tested substances came close to a limit. The latest sample is from 18 December 2025.
- 7th cleanest of 8 areas tested in Plymouth1 area in Plymouth scored lower. The best is PL1 on 9.5. Every area in Plymouth
- Soft water at 28 mg/LLimescale is not a problem across the PL postcode area, so skip softeners and scale filters entirely. How hardness is measured
- PFAS found at 4 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was 6:2 FTSA about 5.3 km away. What was measured
Questions about PL7 water
Is PL7 tap water safe to drink?
Based on the latest tests, PL7 (Plymouth) water scores 9.5/10, which is safe. 0 of 16 tested contaminants exceeded recommended levels. Water is supplied by South West Water.
What contaminants are in PL7 water?
We tested 16 contaminants in PL7 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also measured in rivers and groundwater within 10 km, though not in the tap-water tests themselves.
Who supplies water in PL7?
PL7 (Plymouth) is supplied by South West Water. You can view their full profile and compliance data on our supplier page.
Is PL7 water hard or soft?
No hardness reading has been published for PL7 itself. Across the PL postcode area the typical value is 28 mg/L CaCO3, which is classified as soft. Soft water is gentle on appliances and skin.
Should I use a water filter in PL7?
PL7 water scored 9.5/10 with no contaminants above recommended levels. A filter is optional but can improve taste, especially if you notice a chlorine flavour. See our filter recommendations for your area.
Are there PFAS forever chemicals in PL7 water?
The tap-water tests we hold for PL7 do not include a PFAS result. Environment Agency monitoring found PFAS in 104 river and groundwater samples from 4 sites within 10 km of PL7, the highest being 6:2 FTSA at 0.063 µg/L about 5.3 km away. These are environmental samples, not tests of tap water. The UK currently has no legal limit for PFAS in drinking water; the Drinking Water Inspectorate uses a 0.1 µg/L guideline for individual compounds. Reverse osmosis filters can reduce PFAS levels.
How clean is the river near PL7?
The Environment Agency rated the Tory 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 PL7, which is treated before it reaches homes.
Keep reading
- Best Filter for PFAS RemovalThe filters with independent certification to remove forever chemicals
- PFAS Forever ChemicalsWhat PFAS are and how to reduce your exposure at home
- Is UK Tap Water Safe?Everything you need to know about tap water safety in the UK
- Best Water Filters UKEvery filter type compared on what it actually removes
PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsAll of PlymouthUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near PL7
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 PL7.