UK Water Quality Report • 2026 Data

Water Hardness in OL9

Water supply analysis across 5 postcode sectors in OL9 (United Utilities).

Outcode Avg Hardness45 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode OL9

Looking for water hardness metrics in OL9? Water supplied by United Utilities in this outcode registers a baseline average of 45 PPM across 5 distinct postcode sectors.

Water chemistry can fluctuate across supply zones in OL9. The lowest mineral concentration is recorded in sector OL9 0 at 45 PPM, whereas sector OL9 9 experiences higher mineral levels reaching 45 PPM.

Since OL9 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 OL9

Lowest mineral concentration

Softest
Sector OL9 0197 Postcodes • Soft
45 PPM3.2 °Clark

Hardest Sector in OL9

Highest mineral concentration

Highest Hardness
Sector OL9 9254 Postcodes • Soft
45 PPM3.2 °Clark

All Postcode Sectors in OL9

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