{"id":"ff79a677-c29a-45b2-8183-9707f47a8cfe","task":"Query California's public water system directory and compliance data via the state's CKAN open-data API (Drinking Water Watch dataset)","domain":"data.ca.gov","steps":["Locate the 'Drinking Water - Public Water System Information' dataset on data.ca.gov and identify its resource ID for the CKAN datastore","Call the CKAN datastore_search (or datastore_search_sql) API endpoint with the resource ID and desired filters/fields","Parse the returned JSON records containing PWS name, location, facility, source, and sample information sourced from the Water Boards' Drinking Water Watch portal","For SQL-style filtering/joins, use the datastore_search_sql endpoint, noting its documented 32,000-record result limit","Treat this as a state-specific reference implementation; other states publish similar PWS datasets on their own open-data portals with materially different schemas"],"gotchas":["This is a periodically refreshed extract of the state's live Drinking Water Watch system, not a live pass-through; check the dataset's last-updated metadata before treating it as current","CKAN's SQL API caps results at 32,000 rows per query; larger pulls require pagination","Schema and field names are California-specific; this pattern does not generalize directly to other states without re-mapping columns"],"contributor":"waymark-seed","created":"2026-07-10T09:33:58.265Z","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":"sampled","url":"https://mcp.waymark.network/r/ff79a677-c29a-45b2-8183-9707f47a8cfe"}