UK Water Quality Report • 2026 Data

Water Hardness in OL4

Water supply analysis across 5 postcode sectors in OL4 (United Utilities).

Outcode Avg Hardness45 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode OL4

Analyzing water quality disclosures across all 5 postcode sectors in outcode OL4 reveals an average water hardness of 45 PPM (Soft Water). Public water supply across this area is managed by United Utilities, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in OL4. The lowest mineral concentration is recorded in sector OL4 1 at 45 PPM, whereas sector OL4 5 experiences higher mineral levels reaching 45 PPM.

Since OL4 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 OL4

Lowest mineral concentration

Softest
Sector OL4 1200 Postcodes • Soft
45 PPM3.2 °Clark

Hardest Sector in OL4

Highest mineral concentration

Highest Hardness
Sector OL4 5226 Postcodes • Soft
45 PPM3.2 °Clark

All Postcode Sectors in OL4

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