Records in the live release
3,103
Release 2026-11-12, 12 November 2026. Its fingerprint: 189c4f9a07e10ebab64ee4205eab59d042866d78301658b5a48660a0e0b4acb6 (what that is).
Datasets·UM-006·Water·Early access
Water quality by treatment works
Blue, Green and No Drop scores and compliance results for each water and wastewater treatment works, as a series.
01
What it holds
How far it reaches
3,103 records: every system in the Department of Water and Sanitation's Green Drop 2024 audit (998 wastewater works: 848 municipal, 114 run by the Department of Public Works and Infrastructure, such as prisons, police stations, border posts and military bases, and 36 by Eskom, SANParks, Sasol, Sun City and Nedbank), Blue Drop 2023 full audit (958 water supply systems) and Blue Drop 2024 risk assessment (1,003 systems), each with its score or risk rating, compliance, capacity and flow, and the No Drop 2025 water-loss assessment of 144 water services authorities. Every municipality's record carries its Demarcation Board code. Next: links between the same system across assessments, the Green Drop Watch Report's flow watch lists, and earlier audit years beyond the history fields.
How often it changes
Annual
DWS publishes Blue, Green and No Drop reports roughly yearly, alternating full audits and risk or progress assessments; check the IRIS releases folder each quarter.
Where the figures come from
Department of Water and Sanitation. From the Department of Water and Sanitation's own reports. The department publishes no reuse terms; we have asked for permission and will update this line when it answers. Free and open meanwhile.
02
Measured accuracy
50 of 50 sampled records checked against the source page on 12 November 2026: no errors. The sample and any failures.
03
Get it
On this site
Check your water, free, no account.
Through the API
/v1/datasets/water-quality/records, as JSON, CSV or Excel, with filters and any past date. Fields and filters. It takes a key.
All of it at once (Parquet)
The full history, built with release 2026-11-03. A download takes a key; the fingerprints are public. How to download a snapshot.
water-quality-2026-11-03-records.parquet: 3,103 record rows (every release), 440 kB. sha256eab13822f5f02c8e…water-quality-2026-11-03-facts.parquet: 54,168 facts with their pages, 2.1 MB. sha2568ee693433ca32c59…
For data portals
Described in DCAT in /catalog.json and on this page.
Stories that used it: South Africa’s dams are fuller than a year ago, except along two coasts · Is your tap water safe? Mostly. The sewage is another story
AlsoBack to all datasetsFields and filtersIs it current?Every releaseAccuracy