Loading water report
Fetching the latest data for this area
Loading water report
Fetching the latest data for this area
Runnymede, England
Runnymede
Your water is safe
We checked 14 things and found 3 worth knowing about
GoodYour water is safe
We checked 14 things and found 3 worth knowing about
GoodTap water in GU25 (Runnymede, Runnymede) is supplied by Thames Water and scored 7.4 out of 10 for safety based on 14 tested parameters. 3 contaminants exceeded recommended safe levels: Manganese, Iron, Ammonia. Data is from samples last taken 2003-06-17, sourced from the Environment Agency Water Quality Archive.
Last sampled 2003-06-17 · Tap water tests not yet available for Thames Water
This data is over 23 years old. The Environment Agency hasn't sampled near GU25 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 |
|---|---|---|---|---|
| Manganese | 0.2 mg/L | 0.05 mg/L | 0.08 mg/L | Over limit |
| Iron | 59 mg/L | 0.2 mg/L | 0.3 mg/L | Over limit |
| Ammonia | 3.04 mg/L | 0.5 mg/L | — | Over limit |
Source: Environment Agency
3 contaminants flagged in GU25. These filters are matched to what was found in your water.

Our pick for GU25
Waterdrop WHF21 Whole House
Whole House · NSF/ANSI 42
Removes both Manganese and Iron — the two contaminants flagged in GU25. Protects every tap in your home.
Removes from your water
£600
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 GU25. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Manganese | 0.2 mg/L | 0.05 mg/L | 0.08 mg/L | Over limit |
| Iron | 59 mg/L | 0.2 mg/L | 0.3 mg/L | Over limit |
| Ammonia | 3.04 mg/L | 0.5 mg/L | — | Over limit |
Source: Environment Agency
We'll email you when water quality data changes for GU25.