Kent · South East

Is Rochester water hard or soft?

Hard at 223 ppm · 20 postcode districts

  • Supplier Southern Water
  • County Kent
  • Postcodes 20
Area average
223
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

Rochester water hardness at a glance

  1. Rochester water is hard, averaging 223 ppm across 20 postcode districts.
  2. That is 16 ppm above the UK average of 207 ppm.
  3. The hardest district is ME20 at 253 ppm; the softest is ME1 at 213 ppm.
  4. The supplier is Southern Water.
  5. Expect limescale on kettles, taps and showerheads; see the water softener guide for sizing and costs.

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The average water hardness in Rochester is 223 ppm, classified as hard. Rochester is served by Southern Water, covering 20 postcode districts across Kent in the South East region.

Hardness varies across the area. See the table below for a breakdown by postcode district. ME20 has the hardest water at 253 ppm, while ME1 is the softest at 213 ppm.

By postcode

Water Hardness by Postcode in Rochester

Sorted by hardness. Tap a postcode for full details.

Postcode Water Company Hardness PPM Level
ME20 Southern Water
253
253 ppm Hard
ME19 Southern Water
229
229 ppm Hard
ME18 Southern Water
228
228 ppm Hard
ME17 Southern Water
227
227 ppm Hard
ME16 Southern Water
226
226 ppm Hard
ME15 Southern Water
225
225 ppm Hard
ME14 Southern Water
224
224 ppm Hard
ME13 Southern Water
223
223 ppm Hard
ME12 Southern Water
222
222 ppm Hard
ME11 Southern Water
221
221 ppm Hard
ME9 Southern Water
221
221 ppm Hard
ME10 Southern Water
220
220 ppm Hard
ME8 Southern Water
220
220 ppm Hard
ME7 Southern Water
219
219 ppm Hard
ME6 Southern Water
218
218 ppm Hard
ME5 Southern Water
217
217 ppm Hard
ME4 Southern Water
216
216 ppm Hard
ME3 Southern Water
215
215 ppm Hard
ME2 Southern Water
214
214 ppm Hard
ME1 Southern Water
213
213 ppm Hard
Suppliers

Water Companies Serving Rochester

Tap for full coverage area and hardness data.

Southern Water

263 ppm Hard

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

Water Hardness Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal
Recommended

Products for Rochester

Popular choices for households dealing with hard water.

Splendid Twin Tank Water Softener

Twin-tank electric softener sized for 1 to 7 bedroom homes. Removes limescale from pipes, boilers, and appliances and delivers continuous soft water, with metered regeneration to keep salt use low.

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Philips Shower Filter

Quick win for skin and hair in hard water areas. Reduces chlorine and limescale, fits standard shower hoses in minutes, no tools needed. Cartridge lasts around 6 months.

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BRITA Marella Water Filter Jug

UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.

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FAQ

Common questions about Rochester water

Is Rochester water hard or soft?
Rochester is classified as hard, averaging 223 ppm across 20 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Which postcode in Rochester has the hardest water?
ME20 has the hardest water in Rochester at 253 ppm, while ME1 is the softest at 213 ppm. See the full table above for every district.
Which water company supplies Rochester?
Rochester is supplied by Southern Water, covering 20 postcode districts across Kent.
Is tap water in Rochester 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.
Do I need a water softener in Rochester?
At 223 ppm, many households in Rochester notice limescale in kettles and showerheads within weeks. A shower filter is the cheapest first step; a whole-house softener gives the most complete protection.
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