UK Water Quality Report • 2026 Data

Water Hardness in TN17

Water supply analysis across 5 postcode sectors in TN17 (South East Water).

Outcode Avg Hardness270 PPMHard Water
Regional Quality Overview

Water Supply Analysis: Outcode TN17

Looking for water hardness metrics in TN17? Water supplied by South East Water in this outcode registers a baseline average of 270 PPM across 5 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in TN17. The lowest mineral concentration is recorded in sector TN17 1 at 270 PPM, whereas sector TN17 9 experiences higher mineral levels reaching 270 PPM.

Due to the hard water (270 PPM) in TN17, limescale build-up can occur on heating elements, shower heads, and boilers. Setting your dishwasher water softener to the correct level (e.g. Bosch setting H04) is strongly recommended to prevent cloudy glassware and internal scale accumulation. Review the individual postcode sectors below to get precise dishwasher salt settings and limescale recommendations.

Softest Sector in TN17

Lowest mineral concentration

Softest
Sector TN17 1120 Postcodes • Hard
270 PPM18.9 °Clark

Hardest Sector in TN17

Highest mineral concentration

Highest Hardness
Sector TN17 912 Postcodes • Hard
270 PPM18.9 °Clark

All Postcode Sectors in TN17

Select a postcode sector below to view exact water softener salt settings, limescale protection guides, and appliance recommendations.