MCP server

Tapwatermap

io.github.squidcode/tapwatermap

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

10

Token cost

About 1,099 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http tapwatermap https://mcp.tapwatermap.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.tapwatermap]
url = "https://mcp.tapwatermap.com/mcp"

Gemini CLI

{"mcpServers":{"tapwatermap":{"httpUrl":"https://mcp.tapwatermap.com/mcp"}}}

Cursor

{"mcpServers":{"tapwatermap":{"url":"https://mcp.tapwatermap.com/mcp"}}}

VS Code

{"servers":{"tapwatermap":{"type":"http","url":"https://mcp.tapwatermap.com/mcp"}}}

Antigravity

agy mcp add tapwatermap https://mcp.tapwatermap.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"tapwatermap","server_url":"https://mcp.tapwatermap.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"tapwatermap","server_url":"https://mcp.tapwatermap.com/mcp"}

Tools

• compare_cities ~97 tokens
  Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.
• coverage_stats ~62 tokens
  What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.
• explain_contaminant ~126 tokens
  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.
• fetch ~102 tokens
  Fetch the full plain-English EPA tap-water record for a city id (e.g. 'vt/burlington') returned by `search`. (ChatGPT/Deep-Research compatible.)
• find_cities ~195 tokens
  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.
• get_city_water ~150 tokens
  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 ~82 tokens
  EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.
• list_state_cities ~76 tokens
  List all covered cities in a state (with violation counts).
• search ~102 tokens
  Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)
• search_cities ~107 tokens
  Find covered US cities by name, optionally within a state. Returns counts + the page URL for each.

Browse

• GitHub tools
• GitHub and code hosting
• Health and medicine

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