Harlow, England
Your water in CM18
Harlow
Your water is safe
We checked 24 things and found nothing to worry about
ExcellentYour water is safe
We checked 24 things and found nothing to worry about
ExcellentBased on drinking water tests, your water in CM18 (Harlow) is supplied by Affinity Water. Based on the latest data (last sampled 2025-01-07), 24 things were tested with 0 exceeding recommended levels. The overall water quality score for CM18 is 9.4/10.
Drinking water testsHow we score
Last sampled 2025-01-07 · 3,354 samples
This data is 15 months old. Newer data may be available soon.
What’s in your tap water
Results from drinking water tests in Harlow.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| Coliform Bacteria | 0 count/100ml | 0 count/100ml | 0 count/100ml | Safe |
| E. coli | 0 count/100ml | 0 count/100ml | 0 count/100ml | Safe |
| Colour | 0 mg/L Pt/Co | 20 mg/L Pt/Co | — | Safe |
| Aluminium | 0 mg/L | 0.2 mg/L | — | Safe |
| Iron | 0 mg/L | 0.2 mg/L | 0.3 mg/L | Safe |
| Manganese | 0 mg/L | 0.05 mg/L | 0.08 mg/L | Safe |
Source: Stream Water Data Portal
Filters for CM18
General-purpose filters for common UK tap water concerns.
Our pick for CM18
BRITA Marella XL + MAXTRA PRO
Jug Filter · TUV SUD
A solid all-round filter for CM18. Removes Chlorine, Lead, Copper and more. No installation needed.
Check price & reviews
£25
4.5/5
2 more options
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
Environmental water nearby
Rivers, groundwater and reservoirs near CM18. This is environmental monitoring — not your tap water.
| Substance | Found | Safe Level | WHO Safe Level | Status |
|---|---|---|---|---|
| pH | 8.1 pH | — | — | Safe |
| Temperature | 4.3 °C | — | — | Safe |
| Ammonia | 0.002 mg/L | 0.5 mg/L | — | Safe |
| Nitrate | 13 mg/L | 50 mg/L | 50 mg/L | Safe |
| Nitrite | 0.034 mg/L | 0.5 mg/L | 3 mg/L | Safe |
| Phosphate | 0.11 mg/L | — | — | Safe |
Source: Environment Agency
Get alerts for your area
We'll email you when water quality data changes for CM18.