UK Water Quality Report • 2026 Data

Water Hardness in M99

Water supply analysis across 2 postcode sectors in M99 (United Utilities).

Outcode Avg Hardness45 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode M99

Looking for water hardness metrics in M99? Water supplied by United Utilities in this outcode registers a baseline average of 45 PPM across 2 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in M99. The lowest mineral concentration is recorded in sector M99 1 at 45 PPM, whereas sector M99 2 experiences higher mineral levels reaching 45 PPM.

Since M99 enjoys soft water (45 PPM), residents generally do not need dishwasher salt or heavy-duty limescale descalers. Standard detergent dosages are sufficient for laundry and dishwashing. Review the individual postcode sectors below to get precise dishwasher salt settings and limescale recommendations.

Softest Sector in M99

Lowest mineral concentration

Softest
Sector M99 18 Postcodes • Soft
45 PPM3.2 °Clark

Hardest Sector in M99

Highest mineral concentration

Highest Hardness
Sector M99 23 Postcodes • Soft
45 PPM3.2 °Clark

All Postcode Sectors in M99

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