sdwis.water.service_areas
Look up the geographic service areas of EPA-regulated public water systems. Returns counties, cities, and zip codes served by each utility, along with area type and tribal codes. Filter by state or county to discover which water systems serve a specific area. Filter by PWSID to get all geographic...
This record as markdown: /tools/io-github-whiteknightonhorse-apibase/sdwis.water.service-areas.md
What sdwis.water.service_areas does on Apibase
AI agents call sdwis.water.service_areas to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
limit | integer | — | Maximum number of service area records to return (1–100, default 20) |
pwsid | string | — | Public Water System Identifier (PWSID) to get service areas for a specific system (e.g. CA3310067) |
state | string | — | State or primacy agency code to filter service areas (e.g. CA, TX, FL) |
county | string | — | County name served by the water system (e.g. LOS ANGELES) |
Parameters from the server's own tool schema.
Why sdwis.water.service_areas is rated Low
Retrieves EPA public water system service area data without side effects or data modification.
From the tool's definition Look up geographic service areas, returns counties, cities, zip codes. No modification or deletion.
Attacks that exploit this kind of access
The rule that runs sdwis.water.service_areas safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Apibase, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sdwis.water.service_areas, this is the rule to start with:
sdwis.water.service_areas is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Apibase, apply this rule, and every sdwis.water.service_areas call is checked against it from then on.
Questions about sdwis.water.service_areas
Look up the geographic service areas of EPA-regulated public water systems. Returns counties, cities, and zip codes served by each utility, along with area type and tribal codes. Filter by state or county to discover which water systems serve a specific area. Filter by PWSID to get all geographic areas served by a specific utility. Useful for mapping water service boundaries, identifying utilities for an address, or understanding the geographic scope of a water quality issue. Data source: EPA SDWIS Federal Reporting Services Geographic Areas table, US Gov public domain. It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.
sdwis.water.service_areas accepts 4 parameters: limit, pwsid, state, county. The full parameter table on this page comes from the server's own tool schema.
Register the Apibase MCP server in PolicyLayer and add a rule for sdwis.water.service_areas: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Apibase. Nothing to install.
sdwis.water.service_areas is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the sdwis.water.service_areas rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for sdwis.water.service_areas. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
sdwis.water.service_areas is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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