UK Water Quality Report • 2026 Data

Water Hardness in PL21

Water supply analysis across 3 postcode sectors in PL21 (South West Water).

Outcode Avg Hardness40 PPMSoft Water
Regional Quality Overview

Water Supply Analysis: Outcode PL21

Analyzing water quality disclosures across all 3 postcode sectors in outcode PL21 reveals an average water hardness of 40 PPM (Soft Water). Public water supply across this area is managed by South West Water, responsible for treating and delivering water to residential households.

Water chemistry can fluctuate across supply zones in PL21. The lowest mineral concentration is recorded in sector PL21 0 at 40 PPM, whereas sector PL21 9 experiences higher mineral levels reaching 40 PPM.

Since PL21 enjoys soft water (40 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 PL21

Lowest mineral concentration

Softest
Sector PL21 0350 Postcodes • Soft
40 PPM2.8 °Clark

Hardest Sector in PL21

Highest mineral concentration

Highest Hardness
Sector PL21 9301 Postcodes • Soft
40 PPM2.8 °Clark

All Postcode Sectors in PL21

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