Chemical and radiological sample results

MS0170019 ·, Walls Water Association

What has been detected, ever

Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.

Scroll the table sideways for the dates.

The most recent samples, result by result

The table below lists 11–18 of 18 samples, newest first — collected October 15, 2024 to August 14, 2025. The summary above covers all 18.

23 results from the 8 samples listed here: 9 detected, 14 not detected. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

We withheld the location of 3 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

• Collected

  Aug 14, 2025 09:05

  Sampling point

  DS000 Distribution

  Sample type

  Routine

  Lab sample

  PB-250815-007

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2023 – Dec 31, 2025

  • Copper, Free 1022 EPA method 200.8

    Result

    0.183 mg/l

  • Lead 1030 EPA method 200.8

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

• Collected

  Aug 14, 2025 10:31

  Sampling point

  LC0019 Location withheld

  Sample type

  Routine

  Lab sample

  PB-250815-003

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2023 – Dec 31, 2025

  • Copper, Free 1022 EPA method 200.8

    Result

    0.0623 mg/l

  • Lead 1030 EPA method 200.8

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

• Collected

  Aug 14, 2025 10:10

  Sampling point

  LC0013 Location withheld

  Sample type

  Routine

  Lab sample

  PB-250815-001

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2023 – Dec 31, 2025

  • Copper, Free 1022 EPA method 200.8

    Result

    0.0192 mg/l

  • Lead 1030 EPA method 200.8

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

• Collected

  Feb 24, 2025 09:45

  Sampling point

  SM4 Location withheld

  Sample type

  Routine

  Lab sample

  TH-250225-011

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2025 – Dec 31, 2025

  • TTHM 2950 EPA method 524.2

    Result

    1.44 ug/l

• Collected

  Feb 24, 2025 09:45

  Sampling point

  SM4 Location withheld

  Sample type

  Routine

  Lab sample

  HA-250225-011

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2025 – Dec 31, 2025

  • Total Haloacetic Acids (Haa5) 2456 EPA method 552.2

    Result

    7.3 ug/l

• Collected

  Feb 4, 2025 09:01

  Sampling point

  TF102 Treatment Plant 102

  Sample type

  Routine

  Lab sample

  IN-250205-001

  Laboratory

  MSDH Lab

  • Arsenic 1005 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Barium 1010 EPA method 200.8

    Result

    0.0335 mg/l

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Cadmium 1015 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Chromium 1020 EPA method 200.8

    Result

    0.0008 mg/l

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Fluoride 1025 EPA method QC 10-109-12-2-A

    Result

    0.917 mg/l

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Mercury 1035 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Nickel 1036 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Selenium 1045 EPA method 200.8

    Result

    Not detected below 0.0025 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Antimony, Total 1074 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Beryllium, Total 1075 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

  • Thallium, Total 1085 EPA method 200.8

    Result

    Not detected below 0.0005 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2023 – Dec 31, 2025

• Collected

  Jan 28, 2025 08:40

  Sampling point

  TF102 Treatment Plant 102

  Sample type

  Routine

  Lab sample

  NI-250129-021

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2025 – Dec 31, 2025

  • Nitrate-Nitrite 1038 EPA method QC10107041C

    Result

    Not detected below 0.1 mg/l Minimum Reporting Level

  • Nitrate 1040 EPA method QC10107041C

    Result

    Not detected below 0.08 mg/l Minimum Reporting Level

  • Nitrite 1041 EPA method QC10107041C

    Result

    Not detected below 0.02 mg/l Minimum Reporting Level

• Collected

  Oct 15, 2024 08:01

  Sampling point

  TF102 Treatment Plant 102

  Sample type

  Routine

  Lab sample

  NA-241016-040

  Laboratory

  MSDH Lab

  Monitoring period

  Jan 1, 2022 – Dec 31, 2024

  • Sodium 1052 EPA method 200.7

    Result

    59.4 mg/l

Routine (8).