Tapwatermap
Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
Connect it
Settings → Connectors → Add custom connector
URL: https://mcp.tapwatermap.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://mcp.tapwatermap.com/mcp{
"mcpServers": {
"tapwatermap": {
"url": "https://mcp.tapwatermap.com/mcp"
}
}
}claude mcp add --transport http tapwatermap https://mcp.tapwatermap.com/mcp{
"servers": {
"tapwatermap": {
"type": "http",
"url": "https://mcp.tapwatermap.com/mcp"
}
}
}10 tools, verified live
searchread-onlySearch TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)
fetchread-onlyFetch the full plain-English EPA tap-water record for a city id (e.g. 'vt/burlington') returned by `search`. (ChatGPT/Deep-Research compatible.)
search_citiesread-onlyFind covered US cities by name, optionally within a state. Returns counts + the page URL for each.
get_city_waterread-onlyThe 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_systemread-onlyEPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.
list_state_citiesread-onlyList all covered cities in a state (with violation counts).
find_citiesread-onlyFilter/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_citiesread-onlyCompare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.
explain_contaminantread-onlyPlain-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_statsread-onlyWhat TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.
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