EPA Drinking Water MCP

This community MCP server provides tools to search EPA drinking water systems, violations, enforcement actions, and contaminant measurements using SDWIS and UCMR data. It supports STDIO and Streamable HTTP transports without requiring an API key, allowing agents to resolve water systems, inspect historical violations, and retrieve Lead and Copper Rule summaries.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cyanheads

Vendor documentation

What you can do with it

Search for public water systems by name, state, or county
Retrieve historical SDWA violations for specific water systems
Get enforcement actions and violation associations
Query unregulated contaminant occurrence measurements

Source and maintenance

Community listingRegistry 0.2.0

mcp-registry: io.github.cyanheads/epa-drinking-water-mcp-server@0.2.0 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/epa-drinking-water-mcp-server 0.2.0

npmnpx

@cyanheads/epa-drinking-water-mcp-server package definition

{
  "version": "0.2.0",
  "transport": "stdio",
  "identifier": "@cyanheads/epa-drinking-water-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "CANVAS_PROVIDER_TYPE",
      "format": "string",
      "default": "none",
      "description": "Optional SQL staging in the npm runtime: none or duckdb."
    },
    {
      "name": "SDWIS_DATAFRAME_DROP_ENABLED",
      "format": "string",
      "default": "false",
      "description": "Enable removal of staged tables when DataCanvas is enabled."
    },
    {
      "name": "CANVAS_DEFAULT_ROW_LIMIT",
      "format": "string",
      "default": "10000",
      "description": "SQL retained-row ceiling; the server maximum is 25000."
    },
    {
      "name": "CANVAS_DEFAULT_MEMORY_LIMIT_MB",
      "format": "string",
      "default": "512",
      "description": "DuckDB memory budget per engine in MiB; maximum 512."
    },
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "epa-drinking-water-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/epa-drinking-water-mcp-server@0.2.0"
      ],
      "env": {
        "CANVAS_PROVIDER_TYPE": "<YOUR_CANVAS_PROVIDER_TYPE>",
        "SDWIS_DATAFRAME_DROP_ENABLED": "<YOUR_SDWIS_DATAFRAME_DROP_ENABLED>",
        "CANVAS_DEFAULT_ROW_LIMIT": "<YOUR_CANVAS_DEFAULT_ROW_LIMIT>",
        "CANVAS_DEFAULT_MEMORY_LIMIT_MB": "<YOUR_CANVAS_DEFAULT_MEMORY_LIMIT_MB>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "epa-drinking-water-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/epa-drinking-water-mcp-server@0.2.0"
      ],
      "env": {
        "CANVAS_PROVIDER_TYPE": "<YOUR_CANVAS_PROVIDER_TYPE>",
        "SDWIS_DATAFRAME_DROP_ENABLED": "<YOUR_SDWIS_DATAFRAME_DROP_ENABLED>",
        "CANVAS_DEFAULT_ROW_LIMIT": "<YOUR_CANVAS_DEFAULT_ROW_LIMIT>",
        "CANVAS_DEFAULT_MEMORY_LIMIT_MB": "<YOUR_CANVAS_DEFAULT_MEMORY_LIMIT_MB>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "epa-drinking-water-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/epa-drinking-water-mcp-server@0.2.0"
      ],
      "env": {
        "CANVAS_PROVIDER_TYPE": "<YOUR_CANVAS_PROVIDER_TYPE>",
        "SDWIS_DATAFRAME_DROP_ENABLED": "<YOUR_SDWIS_DATAFRAME_DROP_ENABLED>",
        "CANVAS_DEFAULT_ROW_LIMIT": "<YOUR_CANVAS_DEFAULT_ROW_LIMIT>",
        "CANVAS_DEFAULT_MEMORY_LIMIT_MB": "<YOUR_CANVAS_DEFAULT_MEMORY_LIMIT_MB>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "epa-drinking-water-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/epa-drinking-water-mcp-server@0.2.0"
      ],
      "env": {
        "CANVAS_PROVIDER_TYPE": "<YOUR_CANVAS_PROVIDER_TYPE>",
        "SDWIS_DATAFRAME_DROP_ENABLED": "<YOUR_SDWIS_DATAFRAME_DROP_ENABLED>",
        "CANVAS_DEFAULT_ROW_LIMIT": "<YOUR_CANVAS_DEFAULT_ROW_LIMIT>",
        "CANVAS_DEFAULT_MEMORY_LIMIT_MB": "<YOUR_CANVAS_DEFAULT_MEMORY_LIMIT_MB>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

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