Skip to main content
tapwater
England and Wales average 9.0

Tap water in NG4, GedlingSafe to drink.Very hard.

Supplied by Severn Trent. 1,679 samples, 22 substances, latest on 23 December 2025. Everything is inside the legal limit, and nothing comes close to it.

Get softener quotes for NG4See everything that was tested

9.3 / 10

The tank is as full as the score. The specks are the minerals that make water hard.

What to do about it

Hard water: compare softener quotes

At 341 mg/L a softener is the only thing that stops limescale. Filters do not soften water.

It pays for itself in most homes at this hardness, through a boiler that stays efficient and appliances that last.

Get softener quotes for NG4
ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

£40typical price

Households concerned about PFAS and heavy metals

Check price at Amazon (opens in new tab)
Waterdrop 10UA Under Sink

Waterdrop 10UA Under Sink

£70typical price

High-volume under-sink filtration without RO complexity

Check price at Waterdrop (opens in new tab)

We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money

What's in a glass of NG4 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 66% of it. 18 of 19 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCadmium: 0.00001 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Nitrite: 0.003 mg/L, <1% of the 0.5 mg/L limitNitrite<1%Chromium: 0.00042 mg/L, <1% of the 0.05 mg/L limitChromium<1%Selenium: 0.00043 mg/L, 1% of the 0.04 mg/L limitSelenium1%Antimony: 0.000059 mg/L, 1% of the 0.005 mg/L limitAntimony1%Lead: 0.00014 mg/L, 1% of the 0.01 mg/L limitLead1%Manganese: 0.00073 mg/L, 1% of the 0.05 mg/L limitManganese1%Copper: 0.0361 mg/L, 2% of the 2 mg/L limitCopper2%Mercury: 0.000022 mg/L, 2% of the 0.001 mg/L limitMercury2%Turbidity: 0.12 NTU, 3% of the 4 NTU limitTurbidity3%Boron: 0.03 mg/L, 3% of the 1 mg/L limitBoron3%Trihalomethanes: 0.0034 mg/L, 3% of the 0.1 mg/L limitTrihalomethanes3%Iron: 0.007 mg/L, 3% of the 0.2 mg/L limitIron3%Colour: 0.8 mg/L Pt/Co, 4% of the 20 mg/L Pt/Co limitColour4%Nickel: 0.001 mg/L, 5% of the 0.02 mg/L limitNickel5%Fluoride: 0.09 mg/L, 6% of the 1.5 mg/L limitFluoride6%Aluminium: 0.021 mg/L, 11% of the 0.2 mg/L limitAluminium11%Arsenic: 0.00128 mg/L, 13% of the 0.01 mg/L limitArsenic13%Nitrate: 33.1 mg/L, 66% of the 50 mg/L limitNitrate66%
  1. Nitrate66%
  2. Arsenic13%
  3. Aluminium11%
  4. Fluoride6%
  5. Nickel5%
  6. Colour4%
  7. Iron3%
  8. Trihalomethanes3%
  9. Turbidity3%
  10. Boron3%
  11. Mercury2%
  12. Copper2%
  13. Manganese1%
  14. Lead1%
  15. Antimony1%
  16. Selenium1%
  17. Chromium<1%
  18. Nitrite<1%
  19. Cadmium<1%
  • pH 7.95 pH
  • Conductivity 350 µS/cm
  • Phosphate 0.545 mg/L
All 22 results as a table
SubstanceResultLegal limitShare of limit
Colour0.8 mg/L Pt/Co20 mg/L Pt/Co
4%
Turbidity0.12 NTU4 NTU
3%
pH7.95 pHNo legal limit–
Selenium0.00043 mg/L0.04 mg/L
1%
Nitrate33.1 mg/L50 mg/L
66%
Nitrite0.003 mg/L0.5 mg/L
<1%
Aluminium0.021 mg/L0.2 mg/L
11%
Iron0.007 mg/L0.2 mg/L
3%
Manganese0.00073 mg/L0.05 mg/L
1%
Copper0.0361 mg/L2 mg/L
2%
Fluoride0.09 mg/L1.5 mg/L
6%
Arsenic0.00128 mg/L0.01 mg/L
13%
Cadmium0.00001 mg/L0.005 mg/L
<1%
Chromium0.00042 mg/L0.05 mg/L
<1%
Nickel0.001 mg/L0.02 mg/L
5%
Lead0.00014 mg/L0.01 mg/L
1%
Antimony0.000059 mg/L0.005 mg/L
1%
Conductivity350 µS/cmNo legal limit–
Trihalomethanes0.0034 mg/L0.1 mg/L
3%
Mercury0.000022 mg/L0.001 mg/L
2%
Boron0.03 mg/L1 mg/L
3%
Phosphate0.545 mg/LNo legal limit–

341mg of limescale minerals in every litre, typical for the NG area. NG4 has no reading of its own.

This is the water that furs up kettles

Very hard on the UK scale. It is fine to drink. It is hard on boilers, showers, skin and anything that heats water, and a jug or tap filter will not change that.

Soft400 mg/L

Softener quotes for NG4

Leave your details and we will email you when we can match you with installers who cover NG4. No obligation.

Request a free assessment and we'll come back to you with local installer options for your area.

NG4— auto-detected from your search

100%

free, no obligation

shared only with your consent

Outside your tap

Your river is the Ouse Dyke Catchment (trib of Trent), rated moderate

The Environment Agency rated the Ouse Dyke Catchment (trib of Trent) 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, ammonia 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

Within 10 km

112

forever-chemical detections in nearby rivers and groundwater

At 10 sites. The highest was PFHxS (linear) at 0.032 µg/L, at Bulwell Hall Brook Lake Downstream of Rolls Royce at Hucknall, 9.1 km away, in May 2024. These are river and borehole samples, not tests of your tap water.

Every PFAS sample around Nottingham · Which filters remove PFAS · PFAS explained

NG4 in short

Tap water in NG4 (Gedling) is supplied by Severn Trent in the Gedling Central zone and scores 9.3 out of 10, against an England and Wales average of 9.0. None of the 22 tested substances came close to a limit. The latest sample is from 23 December 2025.

  • Among the hardest water in the country at 341 mg/LVery hard starts at 250 mg/L. At this level kettles scale up within weeks and a softener is a normal purchase across the NG postcode area. How hardness is measured
  • Nitrate is the reading closest to its limit, at 66% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • Scores higher than all 4 neighbouring districtsThe nearest rival is NG21 on 9.2, against 9.3 here. Compare with NG21

Next door

NG219.2 out of 10 · 341 mg/LNG29.0 out of 10 · 341 mg/LNG39.2 out of 10 · 341 mg/LNG149.2 out of 10 · 341 mg/L

Questions about NG4 water

Is NG4 tap water safe to drink?

Based on the latest tests, NG4 (Gedling) water scores 9.3/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.

What contaminants are in NG4 water?

We tested 22 contaminants in NG4 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 NG4?

NG4 (Gedling) is supplied by Severn Trent. You can view their full profile and compliance data on our supplier page.

Is NG4 water hard or soft?

No hardness reading has been published for NG4 itself. Across the NG postcode area the typical value is 341 mg/L CaCO3, which is classified as very hard. Hard water can cause limescale buildup. A water softener or filter jug may help.

Should I use a water filter in NG4?

NG4 water scored 9.3/10 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 NG4 water?

The tap-water tests we hold for NG4 do not include a PFAS result. Environment Agency monitoring found PFAS in 112 river and groundwater samples from 10 sites within 10 km of NG4, the highest being PFHxS (linear) at 0.032 µg/L about 9.1 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 NG4?

The Environment Agency rated the Ouse Dyke Catchment (trib of Trent) 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, ammonia 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 NG4, which is treated before it reaches homes.

Keep reading

PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map

River and groundwater readings near NG4

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.

SubstanceReadingDrinking water limit
pH7.94 pHNone
Temperature17.4 °CNone
Ammonia0.15 mg/L0.5 mg/L
Nitrate5.9 mg/L50 mg/L
Nitrite0.2 mg/L0.5 mg/L
Phosphate0.22 mg/LNone
Dissolved Oxygen8.48 mg/LNone
Lead0.00017 mg/L0.01 mg/L
Conductivity941 µS/cmNone
Cadmium0.000074 mg/L0.005 mg/L
Zinc0.0083 mg/LNone
Nickel0.0048 mg/L0.02 mg/L
Arsenic0.0014 mg/L0.01 mg/L
Turbidity1.2 NTU4 NTU
Copper0.0032 mg/L2 mg/L
Manganese0.013 mg/L0.05 mg/L
Boron0.16 mg/L1 mg/L

Get alerts for your area

We'll email you when water quality data changes for NG4.

Source: Severn Trent test results, published through the Stream Water Data Portal; rivers and PFAS from the Environment Agency. Page updated . How we score · Where the data comes from