[
{
  "pwsid": "MA4239017",
  "sample_id": "362",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 18414988,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.005,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "MA4239017",
  "sample_id": "391",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 19387690,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.004,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "MA4239017",
  "sample_id": "412",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 20737866,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.0054,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "MA4239017",
  "sample_id": "434",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 22238303,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.0081,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "MA4239017",
  "sample_id": "435",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 22238306,
  "contaminant_code": "CU90",
  "result_sign_code": null,
  "sample_measure": 3.19,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "MA4239017",
  "sample_id": "439",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 22848194,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.0014,
  "unit_of_measure": "mg/L"
},
{
  "pwsid": "MA4239017",
  "sample_id": "445",
  "primacy_agency_code": "MA",
  "epa_region": "01",
  "sar_id": 23069013,
  "contaminant_code": "PB90",
  "result_sign_code": null,
  "sample_measure": 0.00179,
  "unit_of_measure": "mg/L"
}
]