Is Exeter Water Hard or Soft? Slightly Hard at 93 ppm

The average water hardness in Exeter is 93 ppm, classified as slightly hard. Exeter is served by South West Water, covering 33 postcode districts across Devon in the South West region.

Hardness varies across the area. See the table below for a breakdown by postcode district. EX39 has the hardest water at 138 ppm, while EX10 is the softest at 63 ppm.

By postcode

Water Hardness by Postcode in Exeter

Sorted by hardness. Tap a postcode for full details.

Postcode	Water Company	Hardness	PPM	Level
EX39	South West Water	138	138 ppm	Moderately Hard
EX38	South West Water	137	137 ppm	Moderately Hard
EX37	South West Water	136	136 ppm	Moderately Hard
EX36	South West Water	135	135 ppm	Moderately Hard
EX35	South West Water	134	134 ppm	Moderately Hard
EX34	South West Water	133	133 ppm	Moderately Hard
EX33	South West Water	132	132 ppm	Moderately Hard
EX32	South West Water	131	131 ppm	Moderately Hard
EX31	South West Water	130	130 ppm	Moderately Hard
EX24	South West Water	100	100 ppm	Slightly Hard
EX23	South West Water	99	99 ppm	Slightly Hard
EX22	South West Water	98	98 ppm	Slightly Hard
EX21	South West Water	97	97 ppm	Slightly Hard
EX20	South West Water	96	96 ppm	Slightly Hard
EX9	South West Water	83	83 ppm	Slightly Hard
EX8	South West Water	82	82 ppm	Slightly Hard
EX7	South West Water	81	81 ppm	Slightly Hard
EX6	South West Water	80	80 ppm	Slightly Hard
EX5	South West Water	79	79 ppm	Slightly Hard
EX4	South West Water	78	78 ppm	Slightly Hard
EX3	South West Water	77	77 ppm	Slightly Hard
EX2	South West Water	76	76 ppm	Slightly Hard
EX1	South West Water	75	75 ppm	Slightly Hard
EX19	South West Water	72	72 ppm	Slightly Hard
EX18	South West Water	71	71 ppm	Slightly Hard
EX17	South West Water	70	70 ppm	Slightly Hard
EX16	South West Water	69	69 ppm	Slightly Hard
EX15	South West Water	68	68 ppm	Slightly Hard
EX14	South West Water	67	67 ppm	Slightly Hard
EX13	South West Water	66	66 ppm	Slightly Hard
EX12	South West Water	65	65 ppm	Slightly Hard
EX11	South West Water	64	64 ppm	Slightly Hard
EX10	South West Water	63	63 ppm	Slightly Hard

Suppliers

Water Companies Serving Exeter

Tap for full coverage area and hardness data.

South West Water

80 ppm Slightly Hard

Each water company publishes its own hardness data, so you can cross-check the Exeter figures here against the published hardness data from South West Water.

Test Your Water in Exeter

At 93 ppm, your water is slightly hard. A home testing kit lets you verify the exact hardness and check for other contaminants.

TESPERT 16-in-1 Water Testing Kit

Home water test strips that check hardness, pH, chlorine, lead, and 12 other parameters. Results in around 60 seconds. 125 strips per pack.

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FAQ

Common questions about Exeter water

Is Exeter water hard or soft?

Exeter is classified as slightly hard, averaging 93 ppm across 33 postcode districts. Limescale build-up is minimal at this level, though individual postcodes vary.

Which postcode in Exeter has the hardest water?

EX39 has the hardest water in Exeter at 138 ppm, while EX10 is the softest at 63 ppm. See the full table above for every district.

Which water company supplies Exeter?

Exeter is supplied by South West Water, covering 33 postcode districts across Devon.

Is tap water in Exeter safe to drink?

Hardness is not a safety issue: the World Health Organization sets no health-based limit for water hardness, so hard and soft water are both fine to drink. Drinking water quality is regulated by the Drinking Water Inspectorate in England and Wales and the Drinking Water Quality Regulator in Scotland, and your water company publishes test results for your area.

Does Exeter have any harder-water postcodes?

EX39 is the hardest district at 138 ppm (moderately hard), though most of Exeter averages 93 ppm.