Horsham, England
Horsham
Your water is safe
We checked 18 things and found 1 worth knowing about
ExcellentYour water is safe
We checked 18 things and found 1 worth knowing about
ExcellentBased on drinking water tests, your water in BN18 (Horsham) is supplied by Southern Water. Based on the latest data (last sampled 2023-12-14), 18 things were tested with 1 exceeding recommended levels. The overall water quality score for BN18 is 9.3/10.
Last sampled 2023-12-14 · 410 samples
This data is over 2 years old. Newer data may be available soon.
Results from drinking water tests in Horsham.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Nitrate | 41 mg/L | 50 mg/L | 50 mg/L | Watch |
Source: Stream Water Data Portal
1 contaminant flagged in BN18. These filters are matched to what was found in your water.

Our pick for BN18
Waterdrop G3P600 Reverse Osmosis
Under-Sink · NSF/ANSI 58, NSF/ANSI 372
The Waterdrop G3P600 Reverse Osmosis is certified to remove Nitrate, which was flagged in BN18. 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
Rivers, groundwater and reservoirs near BN18. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 7.5 pH | — | — | Safe |
| Conductivity | 770 µS/cm | — | — | Safe |
| Temperature | 8.9 °C | — | — | Safe |
| Ammonia | 0.065 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 11 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.0389 mg/L | 0.5 mg/L | 3 mg/L | Safe |
Source: Environment Agency
We'll email you when water quality data changes for BN18.