Locus Sole Source Aquifer

{
  "boundary": {
    "estimatedGroundToleranceMeters": 20.28,
    "geometryCrs": "EPSG:4326",
    "geometrySimplified": true,
    "nearSimplifiedBoundary": false,
    "note": "The source boundary was simplified for bounded lookup. The tolerance is stated in Web Mercator metres; its approximate ground-distance equivalent varies with latitude.",
    "sourceCrs": "EPSG:3857",
    "toleranceMercatorMeters": 25
  },
  "caveats": [
    "The designation is not a contamination finding, says nothing about current water quality, does not itself restrict a private owner, and is not an ordinary private-construction permit decision.",
    "Most of the country is outside a Sole Source Aquifer designation. Being outside one does not mean groundwater is unimportant or unprotected.",
    "The active snapshot uses simplified mapped boundaries. A point close to a boundary needs confirmation from EPA; this lookup is not a survey or legal boundary determination."
  ],
  "designations": [],
  "kind": "epa_sole_source_aquifer",
  "meaning": "EPA's Sole Source Aquifer designation means the aquifer supplies at least 50% of the drinking water for its service area and no economically feasible alternative is available; under SDWA -1424(e), EPA reviews federally funded projects in the designated area for potential to contaminate the aquifer.",
  "message": "The point is outside every designation boundary in the active EPA snapshot. Most of the country is outside a Sole Source Aquifer designation. Being outside one does not mean groundwater is unimportant or unprotected.",
  "multipleDesignations": false,
  "note": "Awareness/diagnostic only. Full briefs are x402-paid. Agents can discover live free tools at https://api.locus.report/tools/list and paid tools, prices, and manifests at https://api.locus.report/.well-known/ai-tool/index.json.",
  "ok": true,
  "point": {
    "latitude": 35.780418000003195,
    "longitude": -78.63910200000142
  },
  "propertyEffect": "The designation is not a contamination finding, says nothing about current water quality, does not itself restrict a private owner, and is not an ordinary private-construction permit decision.",
  "source": {
    "derivedChecksumSha256": "f1d0f2d492d6e3763d262485ee366f2909c608cfb031218e46d359dc78a01194",
    "licenseNote": "U.S. EPA public data; no named open-data license is stated. Cite EPA and do not imply endorsement.",
    "manifestId": "ssa-22e48e0675f17345",
    "name": "U.S. EPA Sole Source Aquifers",
    "sourceChecksumSha256": "22e48e0675f173458be316e549862e8061fcb7609428dcc5d2beb9f51129d7b2",
    "sourceFetchedAt": "2026-07-28T14:05:00Z",
    "sourceLocator": "EPA_Sole_Source_Aquifers.zip",
    "sourcePage": "https://www.epa.gov/dwssa",
    "sourceVintage": "2025-05-21"
  },
  "status": "no_designation",
  "verifyNext": [
    {
      "step": "Open EPA's Sole Source Aquifer program page for the designation process and current guidance.",
      "url": "https://www.epa.gov/dwssa"
    },
    {
      "step": "Use locus_groundwater_context for separate nearby USGS monitoring-well, aquifer-code, and static-water-level context.",
      "url": "https://api.locus.report/tools/call"
    },
    {
      "step": "Contact the applicable EPA regional office for an authoritative boundary determination.",
      "url": "https://www.epa.gov/dwssa/sole-source-aquifer-contacts-epas-regional-offices"
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.locus.report/api/locus-sole-source-aquifer' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"1 E Edenton St, Raleigh, NC 27601"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.locus.report/api/locus-sole-source-aquifer' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"1 E Edenton St, Raleigh, NC 27601"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.locus.report%2Fapi%2Flocus-sole-source-aquifer&method=POST
const res = await pay("https://api.locus.report/api/locus-sole-source-aquifer", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "1 E Edenton St, Raleigh, NC 27601"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.locus.report/api/locus-sole-source-aquifer",
        json={
            "address": "1 E Edenton St, Raleigh, NC 27601",
        },
    )
    print(res.status_code, res.text)