tapwatermap
Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
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What it can do
What data it sees
Do you need an account
No: the server works without sign-in
Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
Server tool list (10)
Raw names from tools/list. Only developers need these.
| search | Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.) |
| fetch | Fetch the full plain-English EPA tap-water record for a city id (e.g. 'vt/burlington') returned by `search`. (ChatGPT/Deep-Research compatible.) |
| search_cities | Find covered US cities by name, optionally within a state. Returns counts + the page URL for each. |
| get_city_water | The core tool: what the EPA has on record for a city's tap water — the active community water systems serving it, populations, sources, and violations (contaminant, health-based or not, dates, status, level vs limit when recorded). Plain-English, sourced, never a safety verdict. |
| get_water_system | EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations. |
| list_state_cities | List all covered cities in a state (with violation counts). |
| find_cities | Filter/rank cities across the dataset — e.g. cities in TX with open health-based violations, or cities with a specific contaminant. Returns ranked matches. |
| compare_cities | Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings. |
| explain_contaminant | Plain-English explanation of an EPA contaminant by name or code: the EPA name, whether the EPA classifies it as health-based, and how often it appears in our records. Not medical advice. |
| coverage_stats | What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date. |