Drinking water quality, North Holland

5 cities covered
5 with a PFAS-4 result

5 of the 5 municipalities in North Holland have a quantified PFAS figure, published by Waternet. Newest result: 31 December 2025.

For comparison, RIVM advises 4.4 ng/L PFOA equivalents. That's a weighted sum, a different measure from our sum of four PFAS (PFOA, PFOS, PFNA, PFHxS) with its 0.5 ng/L benchmark.

Highest published values

Amstelveen: 4.41 ng/L (PFAS-4, 31 December 2025)
Amsterdam: 4.41 ng/L (PFAS-4, 31 December 2025)
Diemen: 4.41 ng/L (PFAS-4, 31 December 2025)
Heemstede: 4.41 ng/L (PFAS-4, 31 December 2025)
Ouder-Amstel: 4.41 ng/L (PFAS-4, 31 December 2025)

Above our benchmark, ranked by PFAS-4

Amsterdam

941,927 Population4.41 ng/L

Amstelveen

95,840 Population4.41 ng/L

Diemen

33,327 Population4.41 ng/L

Heemstede

27,556 Population4.41 ng/L

Ouder-Amstel

14,525 Population4.41 ng/L

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This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.