Your water company
Enter a postcode above to see your local water company information.
Mains water is supplied and monitored by your water company. Results on this map are community screening, not official monitoring.
top of page
Your area, from the map
Search a postcode to see your area
Search here or on the map above. Both show the same place: community results nearby, your water company, housing age, hardness, fluoride and local news.
Showing United Kingdom Filters: All types · All time Map layersCommunity results
Results near you
Filters on the map: All types · All time. Change them in the bar above the map.
Near you
Enter your postcode to see nearby submissions.
In your region
Zoom in to a supported region or open a regional page to see regional submissions.
Map key Lead E. coli / coliform Chlorine Fluoride Arsenic TDS Red outline: above screening levelTests near you
Get an email when a new result is added near you
When a community test result is published near your postcode, we’ll email you what was found and what it means. You can unsubscribe at any time.
- New results near your postcode
- What they mean, in plain English
- One click to unsubscribe
Your area
Water supply, housing age, hardness and fluoride
Worked out from public data for the point you searched. Turn a layer on to see it on the map.
Housing age and lead
Search a postcode to see postcode district housing age
Check with a lead testLead Risk CheckWater hardness
Mapped hardness for searched postcode
Search your postcode to see the mapped hardness category for this location.
Hard water and tasteFluoride
Mapped fluoride for searched postcode
Search your postcode to see the mapped fluoride category for this location.
Fluoride CheckerCheck with a fluoride testOn a private supply?
Private supplies (wells, boreholes, springs) aren’t monitored by a water company. You’re responsible for testing, and your council regulates them.
Source Protection Zones
Enter a postcode above to see local Source Protection Zone information.
Private Supply PlannerThis is local context from public data and community screening, not official monitoring. Your water company’s checker has the official results for your address.
Around you
About United Kingdom
Local news
No local news for United Kingdom yet.
What to do next
The tools that fit your area
Each one gives you an answer, and the right test if you need one.
Well, borehole or spring? Private supplies need regular testing. Build a plan for yours. Private Supply Planner → Already tested? What your result means against the UK standard, and what to do next. Result Decoder →Start from your concern
Every guide has a tool that gives you an answer
Pick your worry. Each guide explains it with the regulator’s own words, and its tool tells you what to do next.
START HERE Not sure what to test Four taps to the right kit, and what it won’t cover. Test Finder → Lead and old pipes How likely lead pipes are in your home, and what to do today. Lead Risk Check → Bacteria and E. coli After rain, a tank or a positive test: what to do and who to tell. Bacteria Next Steps → Taste, smell or colour The likely cause, what to try, and when to call your water company. Symptom Checker → Wells, boreholes, springs A testing plan for your supply, and the rules where you live. Private Supply Planner → Chlorine What a strip reading means, and how to cut the taste. Chlorine Reading Check → Fluoride Your area’s typical level, and how your tap compares. Fluoride Checker → Arsenic Who is at risk, and what to do about a high result. Arsenic Risk Check →Ready to test?
The kits most people start with
All water tests Best first screenComplete Drinking Water Test Kit
Not sure what to test, just moved in, or want a first look at everything.
1 × E. coli 1 × lead 1 × arsenic 5 × chlorine 5 × fluorideE. coli, lead and arsenic, plus chlorine and fluoride.
£55 £45 View kitLead, E. coli and Arsenic Test Kit
The yearly safety screen for a private supply.
E. coli · lead · arsenic £35 View kitLead Test
Mains water in a home built before 1970.
Lead £15.95 View kit What a home screen doesn't cover: nitrate, pH, iron, manganese and enterococci need a lab.Help build a clearer local picture, and get 10% off your next order.*
Add my result *Available when you upload a valid result from a SustainWater test. Stay informed Alerts for your areaBe told when new test results are added near you. Join free, then add your postcode.
Understand a resultMap guide
How to read this map
The map guide loads with the map.
bottom of page