mcpbeat

Tapwatermap MCP Server

io.github.squidcode/tapwatermap
answering

Tapwatermap is answering right now. Last checked 11 min ago. It exposes 10 tools.

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

Uptime history 39 hours of history
39 hours agonow
100.0%
Uptime 24h
91 of 91 checks
10
Tools
read from the server
86 ms
Response time
average over 24h
open, no key
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

run in your terminal
claude mcp add tapwatermap --transport http https://mcp.tapwatermap.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "tapwatermap": {
      "url": "https://mcp.tapwatermap.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.tapwatermap]
url = "https://mcp.tapwatermap.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "tapwatermap": {
      "url": "https://mcp.tapwatermap.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "tapwatermap": {
      "url": "https://mcp.tapwatermap.com/mcp"
    }
  }
}

Available tools 10

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

cities
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.
search_cities
Find covered US cities by name, optionally within a state. Returns counts + the page URL for each.
city
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.
compare
compare_cities
Compare the EPA records of several cities side by side. Pass cities as 'City, ST' strings.
coverage
coverage_stats
What TapWaterMap covers: states, cities, total EPA violation records, and the data quarter/date.
explain
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.
fetch
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.)
search
search
Search TapWaterMap for US cities by name. Returns matching cities with an id you can pass to `fetch`. (ChatGPT/Deep-Research compatible.)
state
list_state_cities
List all covered cities in a state (with violation counts).
water
get_water_system
EPA record for a single water system by its PWSID (e.g. 'VT0005053'): name, population served, source, and violations.

Endpoints

URLTransportStateLatencyChecked
https://mcp.tapwatermap.com/mcp streamable-http answering 63 ms 11 min ago

Tapwatermap — questions

Answers built from our own checks of this server.

What can Tapwatermap do?
It exposes 10 tools, read directly from the server on our last check. Among them: compare_cities, coverage_stats, explain_contaminant, fetch, find_cities, get_city_water and 4 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Tapwatermap working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 86 ms. The bar chart above shows every period we have measured.
How do I connect Tapwatermap?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Tapwatermap need an API key?
No. Tapwatermap completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 10 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Tapwatermap?
It answers our handshake in 86 ms on average, which is faster than 88% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.