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Barnet, England
Barnet
Your water is mostly fine
We checked 13 things and found 4 worth knowing about
FairYour water is mostly fine
We checked 13 things and found 4 worth knowing about
FairTap water in N20 (Barnet, Barnet) is supplied by Thames Water and scored 6.6 out of 10 for safety based on 13 tested parameters. 4 contaminants exceeded recommended safe levels: Ammonia, Fluoride, Iron and 1 more. Data is from samples last taken 2005-01-27, sourced from the Environment Agency Water Quality Archive.
Last sampled 2005-01-27 · Tap water tests not yet available for Thames Water
This data is over 21 years old. The Environment Agency hasn't sampled near N20 recently. Scores reflect the most recent available data.
Here’s what government tests found in water near you.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Ammonia | 0.579 mg/L | 0.5 mg/L | — | Over limit |
| Fluoride | 1.33 mg/L | 1.5 mg/L | 1.5 mg/L | Watch |
| Iron | 0.29 mg/L | 0.2 mg/L | 0.3 mg/L | Over limit |
| Nickel | 0.017 mg/L | 0.02 mg/L | 0.07 mg/L | Watch |
Source: Environment Agency
4 contaminants flagged in N20. These filters are matched to what was found in your water.

Our pick for N20
Waterdrop G3P600 Reverse Osmosis
Reverse Osmosis · NSF/ANSI 58, NSF/ANSI 372
Removes both Fluoride and Nickel — the two contaminants flagged in N20. Fits under your kitchen sink for filtered water on tap.
Removes from your water
£399
Recommendations matched to your area's water data, not sponsorship. We may earn a commission at no extra cost to you. Affiliate disclosure · Full filter guide
Shower filters
Remove chlorine for better skin and hair
Test your water
Confirm exactly what's in your pipes
Learn more about the water quality issues relevant to this area.
Rivers, groundwater and reservoirs near N20. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Ammonia | 0.579 mg/L | 0.5 mg/L | — | Over limit |
| Fluoride | 1.33 mg/L | 1.5 mg/L | 1.5 mg/L | Watch |
| Iron | 0.29 mg/L | 0.2 mg/L | 0.3 mg/L | Over limit |
| Nickel | 0.017 mg/L | 0.02 mg/L | 0.07 mg/L | Watch |
Source: Environment Agency
We'll email you when water quality data changes for N20.