Is NW4 tap water safe to drink?

Based on the latest tests, NW4 (Barnet) water scores 7.7/10, which is safe. 2 of 9 tested contaminants exceeded recommended levels. Water is supplied by Thames Water.

What contaminants are in NW4 water?

We tested 9 contaminants in NW4 water. 2 were flagged, including Fluoride, Iron.

Who supplies water in NW4?

NW4 (Barnet) is supplied by Thames Water. You can view their full profile and compliance data on our supplier page.

Should I use a water filter in NW4?

With 2 contaminants above recommended levels in NW4, 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 NW4 water?

No PFAS (forever chemicals) have been detected in NW4 based on available monitoring data. PFAS are tested at environmental monitoring sites near your postcode.

Barnet, England

Your water in NW4

Barnet

Your water is safe

We checked 9 things and found 2 worth knowing about

Good

Your water is safe

We checked 9 things and found 2 worth knowing about

Good

Thames Water

Your water company

Tap water in NW4 (Barnet, Barnet) is supplied by Thames Water and scored 7.7 out of 10 for safety based on 9 tested parameters. 2 contaminants exceeded recommended safe levels: Fluoride, Iron. Data is from samples last taken 2002-05-09, sourced from the Environment Agency Water Quality Archive.

Environmental monitoringHow we score

Last sampled 2002-05-09 · Tap water tests not yet available for Thames Water

This data is over 24 years old. The Environment Agency hasn't sampled near NW4 recently. Scores reflect the most recent available data.

What we found

Here’s what government tests found in water near you.

Substance	Found	Safe Level	WHO Safe Level	Status
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

FluorideWatch

Found

1.33 mg/L

Safe level

1.5 mg/L

WHO

1.5 mg/L

89% of safe level

IronOver limit

Found

0.29 mg/L

Safe level

0.2 mg/L

WHO

0.3 mg/L

100% of safe level

Source: Environment Agency

What removes these from your water

2 contaminants flagged in NW4. These filters are matched to what was found in your water.

Our pick for NW4

Waterdrop G3P600 Reverse Osmosis

Reverse Osmosis · NSF/ANSI 58, NSF/ANSI 372

The Waterdrop G3P600 Reverse Osmosis is certified to remove Fluoride, which was flagged in NW4. Fits under your kitchen sink for filtered water on tap.

Removes from your water

Fluoride

Check price & reviews

£399

4.6/5

2 more options

Whole House

Waterdrop WHF21 Whole House

Removes Iron

£600

4.5

Jug Filter

ZeroWater 12-Cup Ready-Pour

Removes Fluoride

£40

4.3

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

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Related guides

Learn more about the water quality issues relevant to this area.

Is UK Tap Water Safe?

Everything you need to know about tap water safety in the UK

Water Filter Recommendations

Find the right filter for your water quality issues

Environmental water nearby

Rivers, groundwater and reservoirs near NW4. This is environmental monitoring — not your tap water.

Substance	Found	Safe Level	WHO Safe Level	Status
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

FluorideWatch

Found

1.33 mg/L

Safe level

1.5 mg/L

WHO

1.5 mg/L

89% of safe level

IronOver limit

Found

0.29 mg/L

Safe level

0.2 mg/L

WHO

0.3 mg/L

100% of safe level

Source: Environment Agency

Learn more

How to test your water Best water filters Water in Barnet UK water rankings

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Compare nearby

N12Barnet6.6 NW2Barnet8.6 NW3Barnet8.7 NW9Barnet8 NW11Barnet8.6 N10Barnet8.6 N11Barnet7.5 HA8Barnet7.4 N2Barnet8 N3Barnet9.8

Your water supplier

Thames Water

Loading water report

Fetching the latest data for this area

What we found

Here’s what government tests found in water near you.

Substance	Found	Safe Level	WHO Safe Level	Status
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

FluorideWatch

Found

1.33 mg/L

Safe level

1.5 mg/L

WHO

1.5 mg/L

89% of safe level

IronOver limit

Found

0.29 mg/L

Safe level

0.2 mg/L

WHO

0.3 mg/L

100% of safe level

Source: Environment Agency

What removes these from your water

2 contaminants flagged in NW4. These filters are matched to what was found in your water.

Our pick for NW4

Waterdrop G3P600 Reverse Osmosis

Reverse Osmosis · NSF/ANSI 58, NSF/ANSI 372

The Waterdrop G3P600 Reverse Osmosis is certified to remove Fluoride, which was flagged in NW4. Fits under your kitchen sink for filtered water on tap.

Removes from your water

Fluoride

Check price & reviews

£399

4.6/5

2 more options

Whole House

Waterdrop WHF21 Whole House

Removes Iron

£600

4.5

Jug Filter

ZeroWater 12-Cup Ready-Pour

Removes Fluoride

£40

4.3

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

Environmental water nearby

Rivers, groundwater and reservoirs near NW4. This is environmental monitoring — not your tap water.

Substance	Found	Safe Level	WHO Safe Level	Status
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

FluorideWatch

Found

1.33 mg/L

Safe level

1.5 mg/L

WHO

1.5 mg/L

89% of safe level

IronOver limit

Found

0.29 mg/L

Safe level

0.2 mg/L

WHO

0.3 mg/L

100% of safe level

Source: Environment Agency