Tap water in L10, SeftonSafe to drink.Moderately soft.
Supplied by United Utilities. 1,118 samples, 16 substances, latest on 27 December 2024. Everything is inside the legal limit, and nothing comes close to it.
8.8 / 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 L10 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 came closest to a limit, at 57% of it. 14 of 16 substances used under a quarter of theirs.
- Lead57%
- Trihalomethanes48%
- Bromate8%
- Nitrate8%
- Ammonia6%
- Antimony6%
- Turbidity5%
- Nickel4%
- Iron3%
- Aluminium3%
- Selenium2%
- Cadmium2%
- Chromium2%
- Nitrite2%
- Manganese<1%
- Copper<1%
All 16 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Turbidity | 0.2 NTU | 4 NTU | 5% |
| Copper | 0.0000622 mg/L | 2 mg/L | <1% |
| Nickel | 0.00077 mg/L | 0.02 mg/L | 4% |
| Lead | 0.00574 mg/L | 0.01 mg/L | 57% |
| Aluminium | 0.00622 mg/L | 0.2 mg/L | 3% |
| Iron | 0.007 mg/L | 0.2 mg/L | 3% |
| Manganese | 0.00045 mg/L | 0.05 mg/L | <1% |
| Bromate | 0.00076 mg/L | 0.01 mg/L | 8% |
| Nitrate | 3.76 mg/L | 50 mg/L | 8% |
| Nitrite | 0.0075 mg/L | 0.5 mg/L | 2% |
| Ammonia | 0.0321 mg/L | 0.5 mg/L | 6% |
| Trihalomethanes | 0.0484 mg/L | 0.1 mg/L | 48% |
| Cadmium | 0.00009 mg/L | 0.005 mg/L | 2% |
| Chromium | 0.00083 mg/L | 0.05 mg/L | 2% |
| Antimony | 0.00031 mg/L | 0.005 mg/L | 6% |
| Selenium | 0.00085 mg/L | 0.04 mg/L | 2% |
89mg of limescale minerals in every litre
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 Alt US Bull Bridge, rated moderate
The Environment Agency rated the Alt US Bull Bridge as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, insects and other small river life and phosphate. 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
80
forever-chemical detections in nearby rivers and groundwater
At 6 sites. The highest was PFBA at 0.96 µg/L, at Kodak Ltd. Acorn Road. Wrb No SJ49/64, 5.2 km away, in June 2024. These are river and borehole samples, not tests of your tap water.
Every PFAS sample around Liverpool · Which filters remove PFAS · PFAS explained
L10 in short
Tap water in L10 (Sefton) is supplied by United Utilities in the Sefton Central zone and scores 8.8 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 27 December 2024.
- The lowest score of the 12 areas tested in SeftonL10 scores 8.8 out of 10. The best in Sefton, L21, scores 9.4.
- Every one of the 10 neighbouring districts scores higherL21 next door scores 9.4, against 8.8 here. Supply zones, not distance, explain the gap. See L21
- Lead is the reading closest to its limit, at 57% of the 0.01 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
Questions about L10 water
Is L10 tap water safe to drink?
Based on the latest tests, L10 (Sefton) water scores 8.8/10, which is safe. 0 of 16 tested contaminants exceeded recommended levels. Water is supplied by United Utilities.
What contaminants are in L10 water?
We tested 16 contaminants in L10 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 L10?
L10 (Sefton) is supplied by United Utilities. You can view their full profile and compliance data on our supplier page.
Is L10 water hard or soft?
Water in L10 (Sefton) has a hardness of 89 mg/L CaCO3, which is classified as moderately soft. This is a moderate hardness level.
Should I use a water filter in L10?
L10 water scored 8.8/10 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 L10 water?
The tap-water tests we hold for L10 do not include a PFAS result. Environment Agency monitoring found PFAS in 80 river and groundwater samples from 6 sites within 10 km of L10, the highest being PFBA at 0.96 µg/L about 5.2 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 L10?
The Environment Agency rated the Alt US Bull Bridge as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by fish, insects and other small river life and phosphate. 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 L10, 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 kitsUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near L10
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.
| Substance | Reading | Drinking water limit |
|---|---|---|
| pH | 7.53 pH | None |
| Temperature | 14.2 °C | None |
| Conductivity | 521 µS/cm | None |
| Ammonia | 0.17 mg/L | 0.5 mg/L |
| Nitrate | 2.1 mg/L | 50 mg/L |
| Nitrite | 0.085 mg/L | 0.5 mg/L |
| Phosphate | 0.24 mg/L | None |
| Dissolved Oxygen | 4.27 mg/L | None |
| Zinc | 0.011 mg/L | None |
| Nickel | 0.0083 mg/L | 0.02 mg/L |
| Aluminium | 0.013 mg/L | 0.2 mg/L |
| Copper | 0.0023 mg/L | 2 mg/L |
| Cadmium | 0.000301 mg/L | 0.005 mg/L |
| Hardness (as CaCO3) | 81 mg/L | None |
Get alerts for your area
We'll email you when water quality data changes for L10.