Is SO40 tap water safe to drink?

Based on the latest tests, SO40 (New Forest) water scores 8.9/10, which is safe. 0 of 19 tested contaminants exceeded recommended levels. Water is supplied by Southern Water.

What contaminants are in SO40 water?

We tested 19 contaminants in SO40 water. None exceeded recommended safe levels.

Who supplies water in SO40?

SO40 (New Forest) is supplied by Southern Water. You can view their full profile and compliance data on our supplier page.

Should I use a water filter in SO40?

SO40 water scored 8.9/10 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 SO40 water?

No PFAS (forever chemicals) have been detected in SO40 based on available monitoring data. PFAS are tested at environmental monitoring sites near your postcode.

New Forest, England

Your water in SO40

New Forest

Your water is safe

We checked 19 things and found nothing to worry about

Good

Your water is safe

We checked 19 things and found nothing to worry about

Good

Southern Water

Your water company

Tap water in SO40 (New Forest, New Forest) is supplied by Southern Water and scored 8.9 out of 10 for safety based on 19 tested parameters. No contaminants exceeded recommended safe levels. Data is from 572 samples collected up to 2025-12-05, sourced from Southern Water via the Stream Water Data Portal.

Drinking water testsHow we score

Last sampled 2025-12-05 · 572 samples

What’s in your tap water

Results from drinking water tests in New Forest.

Substance	Found	Safe Level	WHO Safe Level	Status
Aluminium	0.00837 mg/L	0.2 mg/L	—	Safe
Iron	0.0321 mg/L	0.2 mg/L	0.3 mg/L	Safe
Manganese	0.00154 mg/L	0.05 mg/L	0.08 mg/L	Safe
Nitrate	36 mg/L	50 mg/L	50 mg/L	Safe
Nitrite	0.003 mg/L	0.5 mg/L	3 mg/L	Safe
Copper	0.0408 mg/L	2 mg/L	2 mg/L	Safe

AluminiumSafe

Found

0.00837 mg/L

Safe level

0.2 mg/L

WHO

—

4% of safe level

IronSafe

Found

0.0321 mg/L

Safe level

0.2 mg/L

WHO

0.3 mg/L

16% of safe level

ManganeseSafe

Found

0.00154 mg/L

Safe level

0.05 mg/L

WHO

0.08 mg/L

3% of safe level

NitrateSafe

Found

36 mg/L

Safe level

50 mg/L

WHO

50 mg/L

71% of safe level

NitriteSafe

Found

0.003 mg/L

Safe level

0.5 mg/L

WHO

3 mg/L

1% of safe level

CopperSafe

Found

0.0408 mg/L

Safe level

2 mg/L

WHO

2 mg/L

2% of safe level

Source: Stream Water Data Portal

Filters for SO40

General-purpose filters for common UK tap water concerns.

Our pick for SO40

BRITA Marella XL + MAXTRA PRO

Jug Filter · TUV SUD

A solid all-round filter for SO40. Removes Chlorine, Lead, Copper and more. No installation needed.

Check price & reviews

£25

4.5/5

2 more options

Jug Filter

ZeroWater 12-Cup Ready-Pour

£40

4.3

Jug Filter

Aqua Optima Liscia + Evolve+

£20

4.4

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

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

Environmental water nearby

Rivers, groundwater and reservoirs near SO40. This is environmental monitoring — not your tap water.

Substance	Found	Safe Level	WHO Safe Level	Status
pH	8.2 pH	—	—	Safe
Conductivity	520 µS/cm	—	—	Safe
Temperature	8.6 °C	—	—	Safe
Mercury	0.00001 mg/L	0.001 mg/L	0.006 mg/L	Safe
Ammonia	0.067 mg/L	0.5 mg/L	—	Safe
Nitrate	6.94 mg/L	50 mg/L	50 mg/L	Safe

pHSafe

Found

8.2 pH

Safe level

—

WHO

—

Informational — no set limit

ConductivitySafe

Found

520 µS/cm

Safe level

—

WHO

—

Informational — no set limit

TemperatureSafe

Found

8.6 °C

Safe level

—

WHO

—

Informational — no set limit

MercurySafe

Found

0.00001 mg/L

Safe level

0.001 mg/L

WHO

0.006 mg/L

1% of safe level

AmmoniaSafe

Found

0.067 mg/L

Safe level

0.5 mg/L

WHO

—

13% of safe level

NitrateSafe

Found

6.94 mg/L

Safe level

50 mg/L

WHO

50 mg/L

14% of safe level

Source: Environment Agency

Learn more

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Your water supplier

Southern Water

Loading water report

Fetching the latest data for this area

What’s in your tap water

Results from drinking water tests in New Forest.

Substance	Found	Safe Level	WHO Safe Level	Status
Aluminium	0.00837 mg/L	0.2 mg/L	—	Safe
Iron	0.0321 mg/L	0.2 mg/L	0.3 mg/L	Safe
Manganese	0.00154 mg/L	0.05 mg/L	0.08 mg/L	Safe
Nitrate	36 mg/L	50 mg/L	50 mg/L	Safe
Nitrite	0.003 mg/L	0.5 mg/L	3 mg/L	Safe
Copper	0.0408 mg/L	2 mg/L	2 mg/L	Safe

AluminiumSafe

Found

0.00837 mg/L

Safe level

0.2 mg/L

WHO

—

4% of safe level

IronSafe

Found

0.0321 mg/L

Safe level

0.2 mg/L

WHO

0.3 mg/L

16% of safe level

ManganeseSafe

Found

0.00154 mg/L

Safe level

0.05 mg/L

WHO

0.08 mg/L

3% of safe level

NitrateSafe

Found

36 mg/L

Safe level

50 mg/L

WHO

50 mg/L

71% of safe level

NitriteSafe

Found

0.003 mg/L

Safe level

0.5 mg/L

WHO

3 mg/L

1% of safe level

CopperSafe

Found

0.0408 mg/L

Safe level

2 mg/L

WHO

2 mg/L

2% of safe level

Source: Stream Water Data Portal

Filters for SO40

General-purpose filters for common UK tap water concerns.

Our pick for SO40

BRITA Marella XL + MAXTRA PRO

Jug Filter · TUV SUD

A solid all-round filter for SO40. Removes Chlorine, Lead, Copper and more. No installation needed.

Check price & reviews

£25

4.5/5

2 more options

Jug Filter

ZeroWater 12-Cup Ready-Pour

£40

4.3

Jug Filter

Aqua Optima Liscia + Evolve+

£20

4.4

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 SO40. This is environmental monitoring — not your tap water.

Substance	Found	Safe Level	WHO Safe Level	Status
pH	8.2 pH	—	—	Safe
Conductivity	520 µS/cm	—	—	Safe
Temperature	8.6 °C	—	—	Safe
Mercury	0.00001 mg/L	0.001 mg/L	0.006 mg/L	Safe
Ammonia	0.067 mg/L	0.5 mg/L	—	Safe
Nitrate	6.94 mg/L	50 mg/L	50 mg/L	Safe

pHSafe

Found

8.2 pH

Safe level

—

WHO

—

Informational — no set limit

ConductivitySafe

Found

520 µS/cm

Safe level

—

WHO

—

Informational — no set limit

TemperatureSafe

Found

8.6 °C

Safe level

—

WHO

—

Informational — no set limit

MercurySafe

Found

0.00001 mg/L

Safe level

0.001 mg/L

WHO

0.006 mg/L

1% of safe level

AmmoniaSafe

Found

0.067 mg/L

Safe level

0.5 mg/L

WHO

—

13% of safe level

NitrateSafe

Found

6.94 mg/L

Safe level

50 mg/L

WHO

50 mg/L

14% of safe level

Source: Environment Agency