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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.

Arsenic results

MS0040006 , Town of McCool

2 samples have been analysed for Arsenic at Town of McCool.

This is one analyte out of the system’s whole record. For what has ever been detected here, and when, see all chemical and radiological results; for everything the system is tested for, see the analyte list.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

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Every Arsenic result

The 2 samples analysed for this analyte collected between September 25, 2024 and September 25, 2026 are listed below, newest first.

2 Arsenic results from the 2 samples listed here: 0 detected, 2 not detected. Those samples also carried 20 results for other analytes, which are on the full results page.

Arsenic results for Town of McCool, from the 2 samples analysed for it, newest first. This view leaves out other analytes on the same samples. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Sep 16, 2025 13:50
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250917-013
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 16, 2025 13:50, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Oct 29, 2024 14:30
Sampling point
TF104
Sample type
Routine
Lab sample
IN-241030-001
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 29, 2024 14:30, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024

Routine (2).