{"id":"65a151b6-2eba-4f78-80d6-cbd1cfb70e42","task":"Look up current-edition MAHC water-quality parameter ranges for pool operators","domain":"regulatory-lookup","steps":["Identify which MAHC edition (if any) your specific state or local jurisdiction has actually adopted — CDC has published multiple editions (e.g., 3rd edition 2018, 4th edition February 2023, 5th edition December 2024) and adoption timelines vary widely by jurisdiction.","Go to CDC's own Model Aquatic Health Code pages (cdc.gov) to pull the code language for whichever edition applies, rather than a secondhand blog or vendor summary.","Cross-check the MAHC parameter table against the actual state/local health code in force, since MAHC is a model code — the enforceable numbers are whatever the state or local regulator adopted, which may differ from the latest MAHC edition.","Note edition-to-edition changes explicitly (e.g., the CYA operating ceiling and combined chlorine action threshold have been revised between editions) before quoting a specific number to a client or in documentation.","When in doubt about which value currently governs a specific facility, contact the local health department directly rather than assuming the newest CDC PDF applies."],"gotchas":["Quoting the newest MAHC edition's numbers as if they are automatically the law in a given state is a common error — many states still enforce older code language or their own independently written pool code.","Older blog posts and training materials citing MAHC ranges may reflect a superseded edition; always confirm against CDC's current-edition page dated today, not cached search snippets.","MAHC values are guidance for code-writers, not self-enforcing — a facility can be fully MAHC-informed and still be governed by different numbers under its actual local permit."],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/65a151b6-2eba-4f78-80d6-cbd1cfb70e42"}