WaterHard.uk

Is London Water Hard or Soft?

Very Hard at 306 ppm • Greater London, London

306 PPM 0 200 400
Very Hard

The average water hardness in London is 306 ppm, classified as very hard. London is served by Thames Water, covering 171 postcode districts across Greater London in the London region.

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

Water Hardness by Postcode in London

Postcode Water Company Hardness PPM Level
E7 Thames Water
350 ppm
350 ppm Very Hard
E6 Thames Water
349 ppm
349 ppm Very Hard
E5 Thames Water
348 ppm
348 ppm Very Hard
E4 Thames Water
347 ppm
347 ppm Very Hard
E3 Thames Water
346 ppm
346 ppm Very Hard
N9 Thames Water
346 ppm
346 ppm Very Hard
E2 Thames Water
345 ppm
345 ppm Very Hard
N8 Thames Water
345 ppm
345 ppm Very Hard
E1 Thames Water
344 ppm
344 ppm Very Hard
N7 Thames Water
344 ppm
344 ppm Very Hard
N6 Thames Water
343 ppm
343 ppm Very Hard
EC2A Thames Water
342 ppm
342 ppm Very Hard
N5 Thames Water
342 ppm
342 ppm Very Hard
N4 Thames Water
341 ppm
341 ppm Very Hard
N3 Thames Water
340 ppm
340 ppm Very Hard
W9 Thames Water
340 ppm
340 ppm Very Hard
N2 Thames Water
339 ppm
339 ppm Very Hard
W8 Thames Water
339 ppm
339 ppm Very Hard
N1 Thames Water
338 ppm
338 ppm Very Hard
W7 Thames Water
338 ppm
338 ppm Very Hard
W6 Thames Water
337 ppm
337 ppm Very Hard
W5 Thames Water
336 ppm
336 ppm Very Hard
W4 Thames Water
335 ppm
335 ppm Very Hard
SW1Y Thames Water
334 ppm
334 ppm Very Hard
W3 Thames Water
334 ppm
334 ppm Very Hard
EC1Y Thames Water
333 ppm
333 ppm Very Hard
SW1X Thames Water
333 ppm
333 ppm Very Hard
W2 Thames Water
333 ppm
333 ppm Very Hard
SW1W Thames Water
332 ppm
332 ppm Very Hard
EC4Y Thames Water
331 ppm
331 ppm Very Hard
SW1V Thames Water
331 ppm
331 ppm Very Hard
EC1V Thames Water
330 ppm
330 ppm Very Hard
EC4V Thames Water
328 ppm
328 ppm Very Hard
SE9 Thames Water
327 ppm
327 ppm Very Hard
EC1R Thames Water
326 ppm
326 ppm Very Hard
SE28 Thames Water
326 ppm
326 ppm Very Hard
SE8 Thames Water
326 ppm
326 ppm Very Hard
SW20 Thames Water
326 ppm
326 ppm Very Hard
SE27 Thames Water
325 ppm
325 ppm Very Hard
SE7 Thames Water
325 ppm
325 ppm Very Hard
SW1P Thames Water
325 ppm
325 ppm Very Hard
EC4R Thames Water
324 ppm
324 ppm Very Hard
NW9 Thames Water
324 ppm
324 ppm Very Hard
SE26 Thames Water
324 ppm
324 ppm Very Hard
SE6 Thames Water
324 ppm
324 ppm Very Hard
NW8 Thames Water
323 ppm
323 ppm Very Hard
SE25 Thames Water
323 ppm
323 ppm Very Hard
SE5 Thames Water
323 ppm
323 ppm Very Hard
EC1N Thames Water
322 ppm
322 ppm Very Hard
NW7 Thames Water
322 ppm
322 ppm Very Hard
SE24 Thames Water
322 ppm
322 ppm Very Hard
SE4 Thames Water
322 ppm
322 ppm Very Hard
EC1M Thames Water
321 ppm
321 ppm Very Hard
NW6 Thames Water
321 ppm
321 ppm Very Hard
SE23 Thames Water
321 ppm
321 ppm Very Hard
SE3 Thames Water
321 ppm
321 ppm Very Hard
EC4N Thames Water
320 ppm
320 ppm Very Hard
NW5 Thames Water
320 ppm
320 ppm Very Hard
SE2 Thames Water
320 ppm
320 ppm Very Hard
SE22 Thames Water
320 ppm
320 ppm Very Hard
WC2R Thames Water
320 ppm
320 ppm Very Hard
EC4M Thames Water
319 ppm
319 ppm Very Hard
NW4 Thames Water
319 ppm
319 ppm Very Hard
SE1 Thames Water
319 ppm
319 ppm Very Hard
SE21 Thames Water
319 ppm
319 ppm Very Hard
NW3 Thames Water
318 ppm
318 ppm Very Hard
SE20 Thames Water
318 ppm
318 ppm Very Hard
NW2 Thames Water
317 ppm
317 ppm Very Hard
SW1H Thames Water
317 ppm
317 ppm Very Hard
NW1 Thames Water
316 ppm
316 ppm Very Hard
W1W Thames Water
316 ppm
316 ppm Very Hard
WC2N Thames Water
316 ppm
316 ppm Very Hard
SW9 Thames Water
315 ppm
315 ppm Very Hard
SW1E Thames Water
314 ppm
314 ppm Very Hard
SW8 Thames Water
314 ppm
314 ppm Very Hard
W1U Thames Water
314 ppm
314 ppm Very Hard
SW7 Thames Water
313 ppm
313 ppm Very Hard
W1T Thames Water
313 ppm
313 ppm Very Hard
SW6 Thames Water
312 ppm
312 ppm Very Hard
W1S Thames Water
312 ppm
312 ppm Very Hard
SW5 Thames Water
311 ppm
311 ppm Very Hard
SW1A Thames Water
310 ppm
310 ppm Very Hard
SW4 Thames Water
310 ppm
310 ppm Very Hard
WC2H Thames Water
310 ppm
310 ppm Very Hard
EC1A Thames Water
309 ppm
309 ppm Very Hard
SW3 Thames Water
309 ppm
309 ppm Very Hard
E1W Thames Water
308 ppm
308 ppm Very Hard
N22 Thames Water
308 ppm
308 ppm Very Hard
SW2 Thames Water
308 ppm
308 ppm Very Hard
EC4A Thames Water
307 ppm
307 ppm Very Hard
N21 Thames Water
307 ppm
307 ppm Very Hard
WC2E Thames Water
307 ppm
307 ppm Very Hard
N20 Thames Water
306 ppm
306 ppm Very Hard
W1K Thames Water
304 ppm
304 ppm Very Hard
WC2B Thames Water
304 ppm
304 ppm Very Hard
W1J Thames Water
303 ppm
303 ppm Very Hard
WC2A Thames Water
303 ppm
303 ppm Very Hard
E20 Thames Water
302 ppm
302 ppm Very Hard
SW19 Thames Water
302 ppm
302 ppm Very Hard
SW18 Thames Water
301 ppm
301 ppm Very Hard
W1H Thames Water
301 ppm
301 ppm Very Hard
SW17 Thames Water
300 ppm
300 ppm Hard
W1G Thames Water
300 ppm
300 ppm Hard
SW16 Thames Water
299 ppm
299 ppm Hard
W1F Thames Water
299 ppm
299 ppm Hard
SW15 Thames Water
298 ppm
298 ppm Hard
SW14 Thames Water
297 ppm
297 ppm Hard
W1D Thames Water
297 ppm
297 ppm Hard
SW13 Thames Water
296 ppm
296 ppm Hard
W1C Thames Water
296 ppm
296 ppm Hard
EC3V Thames Water
295 ppm
295 ppm Hard
SW12 Thames Water
295 ppm
295 ppm Hard
W1B Thames Water
295 ppm
295 ppm Hard
SE19 Thames Water
294 ppm
294 ppm Hard
SW11 Thames Water
294 ppm
294 ppm Hard
SE18 Thames Water
293 ppm
293 ppm Hard
SW10 Thames Water
293 ppm
293 ppm Hard
WC1X Thames Water
293 ppm
293 ppm Hard
N1C Thames Water
292 ppm
292 ppm Hard
SE17 Thames Water
292 ppm
292 ppm Hard
EC3R Thames Water
291 ppm
291 ppm Hard
SE16 Thames Water
291 ppm
291 ppm Hard
WC1V Thames Water
291 ppm
291 ppm Hard
SE15 Thames Water
290 ppm
290 ppm Hard
SE14 Thames Water
289 ppm
289 ppm Hard
NW11 Thames Water
288 ppm
288 ppm Hard
SE13 Thames Water
288 ppm
288 ppm Hard
EC3N Thames Water
287 ppm
287 ppm Hard
NW10 Thames Water
287 ppm
287 ppm Hard
SE12 Thames Water
287 ppm
287 ppm Hard
WC1R Thames Water
287 ppm
287 ppm Hard
EC3M Thames Water
286 ppm
286 ppm Hard
SE11 Thames Water
286 ppm
286 ppm Hard
SE10 Thames Water
285 ppm
285 ppm Hard
WC1N Thames Water
283 ppm
283 ppm Hard
N19 Thames Water
282 ppm
282 ppm Hard
N18 Thames Water
281 ppm
281 ppm Hard
W14 Thames Water
281 ppm
281 ppm Hard
N17 Thames Water
280 ppm
280 ppm Hard
W13 Thames Water
280 ppm
280 ppm Hard
N16 Thames Water
279 ppm
279 ppm Hard
W12 Thames Water
279 ppm
279 ppm Hard
N15 Thames Water
278 ppm
278 ppm Hard
W11 Thames Water
278 ppm
278 ppm Hard
E18 Thames Water
277 ppm
277 ppm Hard
N14 Thames Water
277 ppm
277 ppm Hard
W10 Thames Water
277 ppm
277 ppm Hard
WC1H Thames Water
277 ppm
277 ppm Hard
E17 Thames Water
276 ppm
276 ppm Hard
N13 Thames Water
276 ppm
276 ppm Hard
E16 Thames Water
275 ppm
275 ppm Hard
N12 Thames Water
275 ppm
275 ppm Hard
E15 Thames Water
274 ppm
274 ppm Hard
EC3A Thames Water
274 ppm
274 ppm Hard
N11 Thames Water
274 ppm
274 ppm Hard
WC1E Thames Water
274 ppm
274 ppm Hard
E14 Thames Water
273 ppm
273 ppm Hard
N10 Thames Water
273 ppm
273 ppm Hard
E13 Thames Water
272 ppm
272 ppm Hard
E12 Thames Water
271 ppm
271 ppm Hard
WC1B Thames Water
271 ppm
271 ppm Hard
E11 Thames Water
270 ppm
270 ppm Hard
WC1A Thames Water
270 ppm
270 ppm Hard
E10 Thames Water
269 ppm
269 ppm Hard
EC2Y Thames Water
265 ppm
265 ppm Hard
EC2V Thames Water
262 ppm
262 ppm Hard
EC2R Thames Water
258 ppm
258 ppm Hard
EC2N Thames Water
254 ppm
254 ppm Hard
EC2M Thames Water
253 ppm
253 ppm Hard
E9 Thames Water
251 ppm
251 ppm Hard
E8 Thames Water
250 ppm
250 ppm Hard

Water Companies Serving London

Thames Water

Average hardness: 302 ppm (Very Hard) • 412 postcodes served

Water Hardness Guides

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal

Recommended Products for London

Popular choices for households dealing with very hard water in this area.

Water2Buy W2B200 Water Softener

From ~£400

Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty.

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Philips AWP1775 Shower Filter

From ~£30

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 ~6 months.

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BRITA Marella Water Filter Jug

From ~£20

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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