Tap water in WN4, WiganSafe to drink.Moderately soft.
Supplied by United Utilities. 1,717 samples, 16 substances, latest on 27 December 2024. Everything is inside the legal limit, and nothing comes close to it.
9.4 / 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 WN4 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.
Trihalomethanes came closest to a limit, at 33% of it. 15 of 16 substances used under a quarter of theirs.
- Trihalomethanes33%
- Ammonia11%
- Bromate9%
- Antimony6%
- Lead6%
- Nitrate5%
- Turbidity4%
- Aluminium4%
- Nickel4%
- Iron3%
- Selenium2%
- Nitrite2%
- Cadmium2%
- Chromium2%
- Manganese1%
- Copper<1%
All 16 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Aluminium | 0.00797 mg/L | 0.2 mg/L | 4% |
| Iron | 0.007 mg/L | 0.2 mg/L | 3% |
| Manganese | 0.00058 mg/L | 0.05 mg/L | 1% |
| Turbidity | 0.16 NTU | 4 NTU | 4% |
| Bromate | 0.00085 mg/L | 0.01 mg/L | 9% |
| Trihalomethanes | 0.033 mg/L | 0.1 mg/L | 33% |
| Copper | 0.0000104 mg/L | 2 mg/L | <1% |
| Nickel | 0.00077 mg/L | 0.02 mg/L | 4% |
| Lead | 0.00055 mg/L | 0.01 mg/L | 6% |
| 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% |
| Nitrate | 2.44 mg/L | 50 mg/L | 5% |
| Nitrite | 0.0098 mg/L | 0.5 mg/L | 2% |
| Ammonia | 0.054 mg/L | 0.5 mg/L | 11% |
63mg 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 Millingford (Newton) Brook, rated moderate
The Environment Agency rated the Millingford (Newton) Brook as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by insects and other small river life, fish and 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.
None of this is a test of your tap water. Environment Agency record · River health across England
179
forever-chemical detections in nearby rivers and groundwater
At 10 sites. The highest was PFBS at 0.092 µg/L, at RSN1856 Rainford Brook at Beech Gardens, 9.9 km away, in July 2024. These are river and borehole samples, not tests of your tap water.
Every PFAS sample around Warrington · Which filters remove PFAS · PFAS explained
WN4 in short
Tap water in WN4 (Wigan) is supplied by United Utilities in the Wigan Central zone and scores 9.4 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.
- 6th cleanest of 9 areas tested in WiganSquarely mid-table for Wigan, between M29 on 9.5 and WN7 on 9.3. Every area in Wigan
- PFAS found at 10 monitoring sites within 10 kmThose are river and groundwater samples, not tap water. The highest was PFBS about 9.9 km away. What was measured
- Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 33% of the 0.1 mg/L maximum. See every reading
Questions about WN4 water
Is WN4 tap water safe to drink?
Based on the latest tests, WN4 (Wigan) water scores 9.4/10, which is safe. 0 of 16 tested contaminants exceeded recommended levels. Water is supplied by United Utilities.
What contaminants are in WN4 water?
We tested 16 contaminants in WN4 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 WN4?
WN4 (Wigan) is supplied by United Utilities. You can view their full profile and compliance data on our supplier page.
Is WN4 water hard or soft?
Water in WN4 (Wigan) has a hardness of 63 mg/L CaCO3, which is classified as moderately soft. This is a moderate hardness level.
Should I use a water filter in WN4?
WN4 water scored 9.4/10 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 WN4 water?
The tap-water tests we hold for WN4 do not include a PFAS result. Environment Agency monitoring found PFAS in 179 river and groundwater samples from 10 sites within 10 km of WN4, the highest being PFBS at 0.092 µg/L about 9.9 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 WN4?
The Environment Agency rated the Millingford (Newton) Brook as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by insects and other small river life, fish and 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. This is a rating of the river, not of tap water in WN4, 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 WiganUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near WN4
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 |
|---|---|---|
| Nickel | 0.0188 mg/L | 0.02 mg/L |
| pH | 7.56 pH | None |
| Temperature | 17.5 °C | None |
| Conductivity | 673 µS/cm | None |
| Ammonia | 0.051 mg/L | 0.5 mg/L |
| Nitrate | 7.1 mg/L | 50 mg/L |
| Nitrite | 0.027 mg/L | 0.5 mg/L |
| Phosphate | 0.36 mg/L | None |
| Dissolved Oxygen | 8.33 mg/L | None |
| Copper | 0.00253 mg/L | 2 mg/L |
| Zinc | 0.00677 mg/L | None |
| Fluoride | 0.213 mg/L | 1.5 mg/L |
| Chromium | 0.00148 mg/L | 0.05 mg/L |
| Arsenic | 0.00135 mg/L | 0.01 mg/L |
Get alerts for your area
We'll email you when water quality data changes for WN4.