Southampton Tap Water
Water provider: Southern Water (Kent, Sussex, Hampshire, Isle of Wight)
Our recommendation
Mid-range filter recommended
Your water has detectable contaminants worth filtering. A countertop or under-sink carbon block with multi-stage filtration handles what is present here.
See recommended water filters →What is in the water
Trihalomethanes (THMs)
DetectedDisinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure linked to cancer risk.
Reported: ~22 ug/L
Chlorine
Within limitsAdded to disinfect water. Generally safe at treatment levels but reacts with organic matter to form disinfection byproducts.
Nitrates
DetectedCommon in agricultural areas from fertiliser runoff. Particularly dangerous for infants.
Reported: ~30 mg/L
Source
Data from the Southern Water Quality Report (2023). Last reviewed 2024-11-01.
Note: Contaminant levels vary by address (older plumbing can leach lead even when the source water does not), sampling location, and time of year. The figures above reflect utility-wide averages from the most recent public report. If you have specific health concerns, request a full report from your utility or test your own tap water.