Cornwall · South West

Is Truro water hard or soft?

Slightly Hard at 91 ppm · 23 postcode districts

Supplier South West Water
County Cornwall
Postcodes 23

Area average

ppm CaCO₃

Slightly Hard

Soft

Moderate

Hard

Very hard

0100200300400+

The average water hardness in Truro is 91 ppm, classified as slightly hard. Truro is served by South West Water, covering 23 postcode districts across Cornwall in the South West region.

Hardness varies across the area — see the table below for a breakdown by postcode district.

By postcode

Water Hardness by Postcode in Truro

Sorted by hardness — tap a postcode for full details.

Postcode	Water Company	Hardness	PPM	Level
TR27	South West Water	109	109 ppm	Slightly Hard
TR26	South West Water	108	108 ppm	Slightly Hard
TR9	South West Water	107	107 ppm	Slightly Hard
TR8	South West Water	106	106 ppm	Slightly Hard
TR7	South West Water	105	105 ppm	Slightly Hard
TR6	South West Water	104	104 ppm	Slightly Hard
TR21	South West Water	103	103 ppm	Slightly Hard
TR5	South West Water	103	103 ppm	Slightly Hard
TR20	South West Water	102	102 ppm	Slightly Hard
TR4	South West Water	102	102 ppm	Slightly Hard
TR3	South West Water	101	101 ppm	Slightly Hard
TR2	South West Water	100	100 ppm	Slightly Hard
TR1	South West Water	99	99 ppm	Slightly Hard
TR19	South West Water	78	78 ppm	Slightly Hard
TR18	South West Water	77	77 ppm	Slightly Hard
TR17	South West Water	76	76 ppm	Slightly Hard
TR16	South West Water	75	75 ppm	Slightly Hard
TR15	South West Water	74	74 ppm	Slightly Hard
TR14	South West Water	73	73 ppm	Slightly Hard
TR13	South West Water	72	72 ppm	Slightly Hard
TR12	South West Water	71	71 ppm	Slightly Hard
TR11	South West Water	70	70 ppm	Slightly Hard
TR10	South West Water	69	69 ppm	Slightly Hard