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\n

@cyanheads/epa-mcp-server

\n

Search and retrieve EPA environmental data: facility compliance (ECHO), toxic releases (TRI), Superfund sites, drinking water systems, environmental-justice screening (EJScreen), and real-time air quality (AirNow). STDIO or Streamable HTTP.\n

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9 Tools • 2 Resources
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\n\n[![Version](https://img.shields.io/badge/Version-0.3.2-blue.svg?style=flat-square)](./CHANGELOG.md) [![License](https://img.shields.io/badge/License-Apache%202.0-orange.svg?style=flat-square)](./LICENSE) [![Docker](https://img.shields.io/badge/Docker-ghcr.io-2496ED?style=flat-square&logo=docker&logoColor=white)](https://github.com/users/cyanheads/packages/container/package/epa-mcp-server) [![MCP SDK](https://img.shields.io/badge/MCP%20SDK-^2.0.0-green.svg?style=flat-square)](https://modelcontextprotocol.io/) [![npm](https://img.shields.io/npm/v/@cyanheads/epa-mcp-server?style=flat-square&logo=npm&logoColor=white)](https://www.npmjs.com/package/@cyanheads/epa-mcp-server) [![TypeScript](https://img.shields.io/badge/TypeScript-^7.0.2-3178C6.svg?style=flat-square)](https://www.typescriptlang.org/) [![Bun](https://img.shields.io/badge/Bun-v1.4.0-blueviolet.svg?style=flat-square)](https://bun.sh/)\n\n
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\n\n[![Install in Claude Desktop](https://img.shields.io/badge/Install_in-Claude_Desktop-D97757?style=for-the-badge&logo=anthropic&logoColor=white)](https://github.com/cyanheads/epa-mcp-server/releases/latest/download/epa-mcp-server.mcpb) [![Install in Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=epa-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvZXBhLW1jcC1zZXJ2ZXIiXSwiZW52Ijp7IkFJUk5PV19BUElfS0VZIjoieW91ci1hcGkta2V5In19) [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install_Server-0098FF?style=for-the-badge&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode:mcp/install?%7B%22name%22%3A%22epa-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads%2Fepa-mcp-server%22%5D%2C%22env%22%3A%7B%22AIRNOW_API_KEY%22%3A%22your-api-key%22%7D%7D)\n\n[![Framework](https://img.shields.io/badge/Built%20on-@cyanheads/mcp--ts--core-67E8F9?style=flat-square)](https://www.npmjs.com/package/@cyanheads/mcp-ts-core)\n\n
\n\n---\n\n## Overview\n\nEPA environmental data across five federal programs — facility compliance (ECHO), toxic chemical releases (TRI), Superfund cleanup sites, drinking water systems (SDWIS), and environmental-justice screening (EJScreen) — plus real-time air quality via AirNow. Search facilities by location or compliance status, pull inspection and enforcement history, track toxic releases across a region, and screen a point for environmental-justice risk from any MCP client. Runs as a stdio process or a local Streamable HTTP server.\n\n### Tools\n\n| Tool | Description |\n|:---|:---|\n| `epa_search_facilities` | Search EPA-regulated facilities by location, industry program, or compliance status across CAA, CWA, RCRA, TRI, and SDWA |\n| `epa_get_facility` | Full compliance profile for one facility by EPA Registry ID — inspections, enforcement actions, and penalties |\n| `epa_search_violations` | Search EPA civil and criminal enforcement cases by state, program, or date range |\n| `epa_get_air_quality` | Current AQI observations or next-day forecasts from AirNow |\n| `epa_get_tri_releases` | Per-chemical Toxic Release Inventory data for a single facility |\n| `epa_search_tri_releases` | Toxic Release Inventory records across facilities in a state or county |\n| `epa_search_superfund` | Search Superfund (CERCLA/SEMS) sites by location or NPL listing status |\n| `epa_search_water_systems` | Search drinking water systems (SDWIS) by state or ZIP code |\n| `epa_get_ejscreen` | EJScreen environmental-justice indicators for a point and buffer |\n\n### Resources\n\n| Resource | Description |\n|:---|:---|\n| `epa://facility/{registry_id}` | Full compliance profile for a facility by EPA Registry ID (same data as `epa_get_facility`) |\n| `epa://superfund/{site_id}` | Superfund site record by SEMS site ID |\n\nAll resource data is also reachable via tools — use `epa_get_facility` and `epa_search_superfund` for programmatic access in tool-only MCP clients.\n\n## Capability reference\n\n### `epa_search_facilities` tool\n\n- Geographic filters: ZIP code, state, city (pair with state), or latitude + longitude + radius_miles (max 100 miles) for proximity search — at least one is required\n- Optional `programs` filter narrows to CAA, CWA, RCRA, TRI, or SDWA registrants; `has_violation` surfaces only non-compliant facilities\n- Returns `registryId` for `epa_get_facility`, plus `fipsCode` when available for Census chaining\n- Up to 100 results per call (default 50)\n\n---\n\n### `epa_get_facility` tool\n\n- Input: `registry_id`, obtained from `epa_search_facilities`\n- Aggregates 3–5 ECHO DFR endpoints in parallel — program flags and TRI totals, compliance summary, inspection/enforcement history, CAA details, CWA/NPDES permit details\n- Uses `Promise.allSettled` — partial data is returned even when one upstream endpoint fails\n- `airCompliance` / `waterCompliance` are present only when the facility is registered under that program\n- `facility_not_found` when ECHO has no record for the Registry ID\n\n---\n\n### `epa_search_violations` tool\n\n- At least one of `state` or `zip_code` is required\n- `program` filter covers CAA, CWA, RCRA, SDWA, CERCLA, FIFRA, or TSCA; `case_type` is civil, criminal, or all (default all)\n- Date range filter by filing date (ISO 8601 `date_filed_start` / `date_filed_end`)\n- `facilityName` and `registryId` are not populated by ECHO's enforcement-case endpoint — chain into `epa_get_facility` for facility detail\n- Up to 100 cases per call (default 50)\n\n---\n\n### `epa_get_air_quality` tool\n\n- Provide `zip_code` or both `latitude` and `longitude`\n- `mode`: `current` (default) or `forecast` (requires `forecast_date`, ISO 8601)\n- Per-pollutant AQI (PM2.5, ozone, CO, SO2, NO2) with numeric `categoryNumber` (1 Good – 6 Hazardous) and `categoryName`\n- `distance_miles` sets the reporting-station search radius (default 25, max 300)\n- Data is preliminary — informational use only, not for regulatory decisions; responses are cached ~1 hour\n- Only registered when `AIRNOW_API_KEY` is set\n\n---\n\n### `epa_get_tri_releases` tool\n\n- `facility_id` is the TRI `facilityId` from `epa_search_tri_releases`; optional `year` (1987–2030, defaults to all available years) and `chemical_name` (partial match)\n- Per-chemical breakdown by medium — air, water, land, underground injection — plus a separate one-time/non-routine release total\n- TRI data lags ~18 months; the most recent available year is typically 2 years prior to the current year\n\n---\n\n### `epa_search_tri_releases` tool\n\n- `state` is required (2-letter); optional `county` (partial match), `year`, and `chemical_name`\n- Up to 200 records per call (default 50); an enrichment flag marks the result truncated when it hits the limit\n- Complement to `epa_get_tri_releases` — use this for area discovery, then drill into a specific facility\n\n---\n\n### `epa_search_superfund` tool\n\n- Two input shapes: `state`/`city`/`zip_code`, or `latitude`+`longitude`+`radius_miles` (0.1–500 miles) — one is required\n- `npl_status` filter: `listed`, `not-listed`, `proposed`, or `all` (default `all`)\n- Up to 200 sites per call (default 50)\n\n---\n\n### `epa_search_water_systems` tool\n\n- At least one of `state` or `zip_code` is required\n- `has_violation` surfaces only systems with active violations; `pws_type` filters to `community`, `non-transient`, or `transient` (output `type` reports the SDWIS codes CWS / NTNCWS / TNCWS)\n- Up to 200 systems per call (default 50)\n\n---\n\n### `epa_get_ejscreen` tool\n\n- Input: `latitude`, `longitude`, `distance` (default 1), and `unit` (`miles` or `kilometers`, default `miles`); kilometers are converted to miles before the request, and the buffer is capped at 15 miles\n- Returns 13 environmental and 6 demographic indicators, each with national/state percentiles, plus the Demographic Index and Supplemental Demographic Index\n- Points outside US coverage return `coverage.valid: false` with a note instead of fabricated indicators\n- Data source: EJScreen v2.2 (2022) via the community-maintained EJAM API (Public Environmental Data Partners) — not a live EPA endpoint\n\n---\n\n### `epa://facility/{registry_id}` resource\n\n- Same data as `epa_get_facility`; `registry_id` comes from `epa_search_facilities`\n- Errors when the Registry ID has no ECHO record\n\n---\n\n### `epa://superfund/{site_id}` resource\n\n- Same data as `epa_search_superfund` records; `site_id` comes from `epa_search_superfund`\n- Errors when the site ID has no SEMS record\n\n## Features\n\nBuilt on [`@cyanheads/mcp-ts-core`](https://github.com/cyanheads/mcp-ts-core): stdio and Streamable HTTP transports, pluggable auth (`none` / `jwt` / `oauth`), swappable storage (`in-memory`, `filesystem`, `Supabase`, `Cloudflare KV/R2/D1`), structured logging with optional OpenTelemetry tracing.\n\nEPA-specific:\n\n- Multiple environmental data sources unified behind a single `epa_` tool surface: ECHO (facility compliance), Envirofacts DMAP (TRI, Superfund, SDWIS), AirNow (real-time air quality), and the community-maintained EJAM API rehosting EJScreen data (v2.2, 2022)\n- Parallel ECHO DFR aggregation in `epa_get_facility` — 3–5 upstream calls resolved concurrently with `Promise.allSettled`\n- AirNow response caching (~1 hour TTL) to stay within per-key rate limits\n\nAgent-friendly output:\n\n- Facility search supplies `registryId` for compliance lookups and `fipsCode` when available for Census queries; TRI search supplies `facilityId` for release details\n- Structured partial failure — `epa_get_facility` returns available program data even when one DFR endpoint is unavailable, with `airCompliance`/`waterCompliance` present only when that program applies\n- Recovery-hint messages on empty results — every search tool returns a `message` field that echoes the applied filters and suggests how to broaden the search\n\n## Getting started\n\nAdd the following to your MCP client configuration file. An AirNow API key is optional — set `AIRNOW_API_KEY` to enable `epa_get_air_quality` (register free at [docs.airnowapi.org](https://docs.airnowapi.org/account/request/)); without it the server starts with the other 8 tools. ECHO, DMAP, and EJScreen tools work without authentication.\n\n```json\n{\n \"mcpServers\": {\n \"epa-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"bunx\",\n \"args\": [\"@cyanheads/epa-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\",\n \"AIRNOW_API_KEY\": \"your-airnow-key\"\n }\n }\n }\n}\n```\n\nOr with npx (no Bun required):\n\n```json\n{\n \"mcpServers\": {\n \"epa-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"npx\",\n \"args\": [\"-y\", \"@cyanheads/epa-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\",\n \"AIRNOW_API_KEY\": \"your-airnow-key\"\n }\n }\n }\n}\n```\n\nOr with Docker:\n\n```json\n{\n \"mcpServers\": {\n \"epa-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"docker\",\n \"args\": [\n \"run\", \"-i\", \"--rm\",\n \"-e\", \"MCP_TRANSPORT_TYPE=stdio\",\n \"-e\", \"AIRNOW_API_KEY=your-airnow-key\",\n \"ghcr.io/cyanheads/epa-mcp-server:latest\"\n ]\n }\n }\n}\n```\n\nFor Streamable HTTP, set the transport and start the server:\n\n```sh\nMCP_TRANSPORT_TYPE=http MCP_HTTP_PORT=3010 AIRNOW_API_KEY=... bun run start:http\n# Server listens at http://localhost:3010/mcp\n```\n\n### Prerequisites\n\n- [Bun v1.4.0](https://bun.sh/) or higher (or Node.js v24+).\n- (Optional) An AirNow API key to enable `epa_get_air_quality` — register free at [docs.airnowapi.org/account/request](https://docs.airnowapi.org/account/request/). Without it the server runs the other 8 tools. ECHO, DMAP, and EJScreen tools require no API key.\n\n### Installation\n\n1. **Clone the repository:**\n\n```sh\ngit clone https://github.com/cyanheads/epa-mcp-server.git\n```\n\n2. **Navigate into the directory:**\n\n```sh\ncd epa-mcp-server\n```\n\n3. **Install dependencies:**\n\n```sh\nbun install\n```\n\n4. **Configure environment:**\n\n```sh\ncp .env.example .env\n# optionally set AIRNOW_API_KEY to enable the air quality tool\n```\n\n## Configuration\n\nAll configuration is validated at startup via Zod schemas in `src/config/`. Key environment variables:\n\n| Variable | Description | Default |\n|:---|:---|:---|\n| `AIRNOW_API_KEY` | **Optional.** Enables `epa_get_air_quality` when set; the server runs the other 8 tools without it. Free registration at [docs.airnowapi.org](https://docs.airnowapi.org/account/request/). | — |\n| `EPA_ECHO_BASE_URL` | ECHO API base URL | `https://echodata.epa.gov/echo` |\n| `EPA_DMAP_BASE_URL` | Envirofacts DMAP API base URL | `https://data.epa.gov/dmapservice` |\n| `EPA_AIRNOW_BASE_URL` | AirNow API base URL | `https://www.airnowapi.org/aq` |\n| `EJSCREEN_API_BASE_URL` | **Optional.** EJScreen (EJAM) API base URL used by `epa_get_ejscreen`. | `https://api.ejanalysis.com` |\n| `MCP_TRANSPORT_TYPE` | Transport: `stdio` or `http` | `stdio` |\n| `MCP_HTTP_PORT` | HTTP server port | `3010` |\n| `MCP_HTTP_ENDPOINT_PATH` | HTTP endpoint path | `/mcp` |\n| `MCP_SESSION_MODE` | HTTP sessions: `auto`, `stateful`, or `stateless`. Explicit environment values override the server default; `auto` resolves to `stateful`. Tenant-scoped caching is independent of sessions. | `stateless` |\n| `MCP_AUTH_MODE` | Auth mode: `none`, `jwt`, or `oauth` | `none` |\n| `MCP_LOG_LEVEL` | Log level (RFC 5424) | `info` |\n| `LOGS_DIR` | Directory for log files (Node.js only) | `/logs` |\n| `STORAGE_PROVIDER_TYPE` | Storage backend: `in-memory`, `filesystem`, `supabase`, `cloudflare-kv/r2/d1` | `in-memory` |\n| `OTEL_ENABLED` | Enable [OpenTelemetry](https://github.com/cyanheads/mcp-ts-core/tree/main/docs/telemetry) tracing and metrics | `false` |\n\nSee [`.env.example`](./.env.example) for the full list of optional overrides.\n\n## Running the server\n\n### Local development\n\n- **Build and run:**\n\n ```sh\n # One-time build\n bun run rebuild\n\n # Run the built server\n bun run start:stdio\n # or\n bun run start:http\n ```\n\n- **Run checks and tests:**\n\n ```sh\n bun run devcheck # Lint, format, typecheck, security\n bun run test # Vitest test suite\n bun run lint:mcp # Validate MCP definitions against spec\n ```\n\n### Docker\n\n```sh\ndocker build -t epa-mcp-server .\ndocker run --rm -e AIRNOW_API_KEY=your-key -p 3010:3010 epa-mcp-server\n```\n\nThe Dockerfile defaults to HTTP transport, stateless session mode, and logs to `/var/log/epa-mcp-server`. OpenTelemetry peer dependencies are installed by default — build with `--build-arg OTEL_ENABLED=false` to omit them.\n\n## Project structure\n\n| Directory | Purpose |\n|:---|:---|\n| `src/index.ts` | `createApp()` entry point — registers tools/resources and inits services. |\n| `src/config` | Server-specific environment variable parsing and validation with Zod. |\n| `src/mcp-server/tools` | Tool definitions (`*.tool.ts`). Nine tools across ECHO, DMAP, EJAM, and AirNow. |\n| `src/mcp-server/resources` | Resource definitions (`*.resource.ts`). Facility and Superfund URI handlers. |\n| `src/services/echo` | ECHO REST API service layer — facility search, facility detail, enforcement cases. |\n| `src/services/dmap` | Envirofacts DMAP service layer — TRI releases, Superfund sites, drinking water systems. |\n| `src/services/airnow` | AirNow service layer — current and forecast AQI observations. |\n| `src/services/ejscreen` | EJScreen (EJAM) service layer — environmental-justice indicators for a point + buffer. |\n| `tests/` | Unit and integration tests mirroring `src/`. |\n\n## Development guide\n\nSee [`CLAUDE.md`](./CLAUDE.md) for development guidelines and architectural rules. The short version:\n\n- Handlers throw, framework catches — no `try/catch` in tool logic\n- Use `ctx.log` for request-scoped logging, `ctx.state` for tenant-scoped storage\n- Register new tools and resources via the barrels in `src/mcp-server/*/definitions/index.ts`\n- Wrap external API calls: validate raw → normalize to domain type → return output schema; never fabricate missing fields\n- ECHO searches must enforce at least one geographic parameter — unscoped queries time out against the live API\n\n## Contributing\n\nIssues are welcome. Run checks and tests before submitting:\n\n```sh\nbun run devcheck\nbun run test\n```\n\n## License\n\nApache-2.0 — see [LICENSE](LICENSE) for details.\n","readmeFilename":"README.md"}