Official MCP RegistryListed
io.github.squidcode/tapwatermap
Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
First seen 2 Oct 2026. Evidence as of 2 Oct 2026.
10
Tools
From an anonymous probe
1
Source listings
Each with its own history
0
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| compare_cities | Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings. | Read-only |
| coverage_stats | What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date. | Read-only |
| 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. | Read-only |
| 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.) | Read-only |
| 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. | Read-only |
| 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. | Read-only |
| get_water_system | EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations. | Read-only |
| list_state_cities | List all covered cities in a state (with violation counts). | Read-only |
| search | Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.) | Read-only |
| search_cities | Find covered US cities by name, optionally within a state. Returns counts + the page URL for each. | Read-only |
Change history
No changes since the first observation. The first snapshot is the baseline.
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | io.github.squidcode/tapwatermap | 2 Oct 2026 | 2 Oct 2026 | 1 |