[
{
  "pwsid": "TX1290022",
  "sample_id": "TX141239",
  "primacy_agency_code": "TX",
  "epa_region": "06",
  "sar_id": 21833751,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.00244,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "TX1290022",
  "sample_id": "TX145241",
  "primacy_agency_code": "TX",
  "epa_region": "06",
  "sar_id": 22553885,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.00187,
  "unit_of_measure": "mg/L"
}
]