Tap water in MK45, Central BedfordshireTurbidity is over the limit.Very hard.
Supplied by Thames Water. 10 substances, latest on 4 September 2026. Turbidity came in above the legal limit. Everything else passed.
5.6 / 10
The tank is as full as the score. The specks are the minerals that make water hard.
What to do about it
Osmio PRO-III Ultimate Whole House
£499typical price
Removes turbidity, the result that stood out in MK45.
Stop the limescale
At 274 mg/L a softener is the only thing that stops limescale. Filters do not soften water.
BWT E1 Single Lever
£250typical price
Removes turbidity, the result that stood out in MK45.
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What's in a glass of MK45 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.
Turbidity is over its legal limit, at 148% of it.
- Turbidity148%
- Iron55%
- Ammonia52%
- Nitrate36%
- Nitrite12%
- pH 6.97 pH
- Temperature 18.7 °C
- Conductivity 1235 µS/cm
- Phosphate 0.65 mg/L
- Dissolved Oxygen 3.58 mg/L
All 10 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Turbidity | 5.9 NTU | 4 NTU | 148% |
| pH | 6.97 pH | No legal limit | – |
| Temperature | 18.7 °C | No legal limit | – |
| Conductivity | 1235 µS/cm | No legal limit | – |
| Nitrate | 18 mg/L | 50 mg/L | 36% |
| Nitrite | 0.058 mg/L | 0.5 mg/L | 12% |
| Phosphate | 0.65 mg/L | No legal limit | – |
| Dissolved Oxygen | 3.58 mg/L | No legal limit | – |
| Ammonia | 0.26 mg/L | 0.5 mg/L | 52% |
| Iron | 0.11 mg/L | 0.2 mg/L | 55% |
274mg of limescale minerals in every litre, typical for the MK area. MK45 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.
Softener quotes for MK45
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Your river is the Running Waters-Steppingley, rated moderate
The Environment Agency rated the Running Waters-Steppingley as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by 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
MK45 in short
Tap water in MK45 (Central Bedfordshire) is supplied by Thames Water in the Central Bedfordshire Central zone and scores 5.6 out of 10, against an England and Wales average of 9.0. 1 of 10 tested substances was close to or over a limit. The latest sample is from 4 September 2026.
- Turbidity was measured at 5.9 NTU, 48% over the UK limitIt is the only one of 10 tested substances to go over its limit. See the full results
- The lowest score of the 9 areas tested in Central BedfordshireMK45 scores 5.6 out of 10. The best in Central Bedfordshire, SG15, scores 8.8.
- 3.4 points below the national average of 9Below the typical tested district in the UK, which is worth knowing before you choose a filter. Compare every area
Questions about MK45 water
Is MK45 tap water safe to drink?
Based on the latest tests, MK45 (Central Bedfordshire) water scores 5.6/10, which is mostly safe but has some issues. 1 of 10 tested contaminants exceeded recommended levels. Water is supplied by Thames Water.
What contaminants are in MK45 water?
We tested 10 contaminants in MK45 water. 1 were flagged, including Turbidity.
Who supplies water in MK45?
MK45 (Central Bedfordshire) is supplied by Thames Water. You can view their full profile and compliance data on our supplier page.
Is MK45 water hard or soft?
No hardness reading has been published for MK45 itself. Across the MK postcode area the typical value is 274 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 MK45?
With 1 contaminant above recommended levels in MK45, 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 MK45 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for MK45, 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 MK45?
The Environment Agency rated the Running Waters-Steppingley as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by 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 MK45, which is treated before it reaches homes.
Keep reading
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- Salt-free softenersConditioners and electronic descalers, honestly assessed
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