# adw.county_water

Drinking-water contamination index from EPA SDWA health-based violations (ADW-304). Returns national percentile rank, band, and violation rate per public water system. Pass county as a 5-digit county FIPS (e.g. '12011') or 'County Name, ST' (e.g. 'Lee County, FL'). Coverage: 3,160 counties.

Agent View of the PolicyLayer registry record for `adw.county_water`. HTML page: https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.county-water

## Facts

- Tool: `adw.county_water`
- Server: AlpineDataWorks Intelligence Server (`https://api.alpinedataworks.com/mcp`) — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server.md
- Homepage: https://github.com/https://api.alpinedataworks.com/mcp
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `county` | string | yes | 5-digit county FIPS (e.g. '12011') or 'County Name, ST' (e.g. 'Lee County, FL'). |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "adw.county_water",
    "arguments": {
      "county": "<county>"
    }
  }
}
```

## Why adw.county_water is rated Low

This is a pure data retrieval tool that queries a public health database (EPA violations) and returns statistical rankings and rates. No side effects, no mutations, no code execution, no financial transactions. The tool merely fetches and presents existing public health data, making it a straightforward Read category with low severity.

From the tool's own definition: "Tool description states it 'Returns national percentile rank, band, and violation rate per public water system' — retrieves and queries EPA SDWA drinking-water contamination data with no modification, deletion, or execution capability."

## Use case

AI agents call adw.county_water to retrieve information from AlpineDataWorks Intelligence Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches AlpineDataWorks Intelligence Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "adw.county_water": {}
  }
}
```

## Other tools on AlpineDataWorks Intelligence Server (195)

- `adw.adw_001` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-001.md
- `adw.adw_002` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-002.md
- `adw.adw_003` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-003.md
- `adw.adw_004` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-004.md
- `adw.adw_005` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-005.md
- `adw.adw_006` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-006.md
- `adw.adw_007` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-007.md
- `adw.adw_008` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-008.md
- `adw.adw_009` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-009.md
- `adw.adw_010` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-010.md
- `adw.adw_011` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-011.md
- `adw.adw_015` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-015.md
- `adw.adw_016` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-016.md
- `adw.adw_017` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-017.md
- `adw.adw_018` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-018.md
- `adw.adw_019` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-019.md
- `adw.adw_020` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-020.md
- `adw.adw_021` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-021.md
- `adw.adw_023` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-023.md
- `adw.adw_024` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-024.md
- `adw.adw_025` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-025.md
- `adw.adw_026` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-026.md
- `adw.adw_027` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-027.md
- `adw.adw_028` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-028.md
- `adw.adw_029` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-029.md
- `adw.adw_030` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-030.md
- `adw.adw_031` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-031.md
- `adw.adw_032` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-032.md
- `adw.adw_033` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-033.md
- `adw.adw_034` — Read — https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server/adw.adw-034.md
- …and 165 more: https://policylayer.com/tools/com-alpinedataworks-adw-intelligence-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-alpinedataworks-adw-intelligence-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-alpinedataworks-adw-intelligence-server