Drinking Water MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 279 installs a week from npm. Last commit 2 Nov 2026.
US drinking water systems from EPA SDWIS: look up a public water system, its violations and its.
Today is the operative word: we check Drinking Water MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add drinking-water-mcp -- npx -y @mrfentmen/drinking-water-mcp
{
"mcpServers": {
"drinking-water-mcp": {
"command": "npx",
"args": [
"-y",
"@mrfentmen/drinking-water-mcp"
]
}
}
}
[mcp_servers.drinking-water-mcp]
command = "npx"
args = ["-y", "@mrfentmen/drinking-water-mcp"]
{
"mcpServers": {
"drinking-water-mcp": {
"command": "npx",
"args": [
"-y",
"@mrfentmen/drinking-water-mcp"
]
}
}
}
{
"servers": {
"drinking-water-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@mrfentmen/drinking-water-mcp"
]
}
}
}
EPA drinking water data: 434,757 public water systems, violations, lead & copper, PFAS. No key.
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Answers built from our own checks of this server.