io.github.squidcode/tapwatermap

Official10 tools

Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.

Query US tap-water quality data from EPA SDWIS records by city, system, or contaminant.

Captured live from the server via tools/list.

search

Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)

Parameters (1)

querystringrequired
City name or partial name, e.g. 'Burlington'.

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.)

Parameters (1)

idstringrequired
City id like 'vt/burlington' (state/slug).

search_cities

Find covered US cities by name, optionally within a state. Returns counts + the page URL for each.

Parameters (3)

querystringrequired
statestring
Optional 2-letter state code, e.g. 'TX'.
limitinteger

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.

Parameters (2)

citystringrequired
statestringrequired
2-letter state code, e.g. 'VT'.

get_water_system

EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.

Parameters (1)

pwsidstringrequired

list_state_cities

List all covered cities in a state (with violation counts).

Parameters (1)

statestringrequired
2-letter state code.

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.

Parameters (6)

statestring
Optional 2-letter state code.
contaminantstring
Optional EPA contaminant code or name (use explain_contaminant to find a code).
healthBasedOnlyboolean
minPopulationinteger
openViolationsOnlyboolean
Only cities with violations not returned to compliance.
limitinteger

compare_cities

Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.

Parameters (1)

citiesarrayrequired
e.g. ['Burlington, VT', 'Houston, TX']

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.

Parameters (1)

contaminantstringrequired
Contaminant name or EPA code, e.g. 'TTHM' or '2950'.

coverage_stats

What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.

No parameters.

Install

claude_desktop_config.json

{
  "mcpServers": {
    "tapwatermap": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.tapwatermap.com/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.