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EPA National Primary Drinking Water Regulations (MCL table)

https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations

[mandate][threshold][traffic] The legally enforceable Maximum Contaminant Levels - the canonical L2 numeric-threshold target (200 at curation).

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Timeline

1. observed 2026-08-31T22:51:21Z — HTTP 200 — 1220794261bb68ad8f92…
2. observed 2026-08-29T07:05:23Z — HTTP 200 — 1220e35b776e7edbc09e…
3. observed 2026-08-28T11:24:10Z — HTTP 200 — 122075c20d6afe0ff8c2…
4. observed 2026-08-17T13:06:15Z — HTTP 200 — 1220801f35663ab7bbcb…
5. observed 2026-08-13T07:53:17Z — HTTP 200 — 12203454ac1c69eefafb…
6. observed 2026-08-12T19:20:49Z — HTTP 200 — 1220f59c61841f576695…
7. observed 2026-08-07T00:16:54Z — HTTP 200 — 12203454ac1c69eefafb…
8. observed 2026-08-05T19:54:59Z — HTTP 200 — 122026edf13b1c7f669f…
9. observed 2026-08-04T14:39:57Z — HTTP 200 — 12208755a0aebbee7b39…
10. observed 2026-07-20T14:51:48Z — HTTP 200 — 122026edf13b1c7f669f…