{"service":"Drinking water records","agency":"Mississippi State Department of Health","sourceSystem":"SDWIS/STATE","description":"Public drinking water system records, as JSON: codes decoded, missing values reported as missing, suspect records flagged.","identifier":{"name":"pwsid","example":"MS0010002","note":"The only SYSTEM identifier accepted or returned here. Users will not know it — find one with ?q=."},"directory":[{"url":"https://api.alpha.dww-next.mswater.us/openapi/index.json","get":"Every endpoint in one line, each priced.","when":"Almost always. Start here, not with the whole description.","approxTokens":2700},{"url":"https://api.alpha.dww-next.mswater.us/llms.txt","get":"How to answer a question here, in prose, and the ways a naive reading goes wrong.","when":"Once per session, the first time you use this API.","approxTokens":3760},{"url":"https://api.alpha.dww-next.mswater.us/coverage","get":"What is served, what the agency publishes that this does not, what nobody publishes. Scope and disclaimer in full.","when":"BEFORE saying a record does not exist — an empty result and an unserved record type are different absences.","approxTokens":1830},{"url":"https://api.alpha.dww-next.mswater.us/v1/code-tables","get":"Every coded value, with its decode if any.","when":"Rarely — codes arrive decoded, with their provenance, inline."},{"url":"https://api.alpha.dww-next.mswater.us/openapi.json","get":"The complete OpenAPI description.","when":"Generating a client. To answer a question, the index plus a slice or two costs a fraction.","approxTokens":81340},{"url":"https://alpha.dww-next.mswater.us","get":"The human site.","when":"You are citing a source to someone, or handing off to a reader."}],"startHere":[{"purpose":"Find a system by name, PWSID or county","url":"https://api.alpha.dww-next.mswater.us/v1/water-systems?q=olive"},{"purpose":"One system at a glance — not its samples; see its notCarriedHere","url":"https://api.alpha.dww-next.mswater.us/v1/water-systems/{pwsid}/summary"},{"purpose":"What the search filters accept","url":"https://api.alpha.dww-next.mswater.us/v1/water-systems/search-options"}]}