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Water Hardness (HAR)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: har.ttl
- Name
waterHardness- Datatype
- Real
- Definition
- The 'hardness' of a sample of water as determined by the combined mass of calcium carbonate and magnesium carbonate per volume of solution.
- Description
- Calcium and magnesium enter water mainly through the weathering of rocks. 'Hard' water has a high mineral content (in contrast with 'soft' water).
- Accepted
- 2013-10-18
- Defined by
- DFDD
- Physical quantity
- massDensity
- Recommended unit
- Gram per cubic Metre
- Used by
- ZI024 Water Resource Information
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.