Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
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https://mcp.tapwatermap.com/mcp10 tools · 124mssearchSearch TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)
| Parameter | Type | Description |
|---|---|---|
| query* | string | City name or partial name, e.g. 'Burlington'. |
fetchFetch the full plain-English EPA tap-water record for a city id (e.g. 'vt/burlington') returned by `search`. (ChatGPT/Deep-Research compatible.)Fetch the full plain-English EPA tap-water record for a city id (e.g. 'vt/burlington') returned by `search`. (ChatGPT/Deep-Research compatible.)
| Parameter | Type | Description |
|---|---|---|
| id* | string | City id like 'vt/burlington' (state/slug). |
search_citiesFind covered US cities by name, optionally within a state. Returns counts + the page URL for each.Find covered US cities by name, optionally within a state. Returns counts + the page URL for each.
| Parameter | Type | Description |
|---|---|---|
| query* | string | — |
| state | string | Optional 2-letter state code, e.g. 'TX'. |
| limit | integer | — |
get_city_waterThe 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.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.
| Parameter | Type | Description |
|---|---|---|
| city* | string | — |
| state* | string | 2-letter state code, e.g. 'VT'. |
get_water_systemEPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.
| Parameter | Type | Description |
|---|---|---|
| pwsid* | string | — |
list_state_citiesList all covered cities in a state (with violation counts).List all covered cities in a state (with violation counts).
| Parameter | Type | Description |
|---|---|---|
| state* | string | 2-letter state code. |
find_citiesFilter/rank cities across the dataset — e.g. cities in TX with open health-based violations, or cities with a specific contaminant. Returns ranked matches.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.
| Parameter | Type | Description |
|---|---|---|
| state | string | Optional 2-letter state code. |
| contaminant | string | Optional EPA contaminant code or name (use explain_contaminant to find a code). |
| healthBasedOnly | boolean | — |
| minPopulation | integer | — |
| openViolationsOnly | boolean | Only cities with violations not returned to compliance. |
| limit | integer | — |
compare_citiesCompare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.
| Parameter | Type | Description |
|---|---|---|
| cities* | array | e.g. ['Burlington, VT', 'Houston, TX'] |
explain_contaminantPlain-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.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.
| Parameter | Type | Description |
|---|---|---|
| contaminant* | string | Contaminant name or EPA code, e.g. 'TTHM' or '2950'. |
coverage_statsWhat TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.
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Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
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