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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.

Chemical and radiological sample results

MS0710011 , Walker Switch Water Assn

10 of the 13 analytes this system has been tested for have been detected at least once, across 91 samples on record.

The other 3 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.

Across all 91 samples on record, detections range from August 23, 2004 to September 16, 2025. These figures cover the whole record.

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

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.

Every analyte ever detected for Walker Switch Water Assn, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte Kind Detected in First detected Last detected
Copper, Free 1022 Inorganic Chemical 63 of 63 results Aug 14, 2007 Aug 8, 2023
Lead 1030 Inorganic Chemical 25 of 63 results Aug 14, 2007 Sep 3, 2020
TTHM 2950 Organic Chemical 14 of 18 results Aug 23, 2004 Sep 16, 2025
Chloroform 2941 Organic Chemical 10 of 13 results Sep 23, 2009 Sep 16, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 19 results Sep 23, 2009 Aug 29, 2023
Bromodichloromethane 2943 Organic Chemical 4 of 13 results May 21, 2024 Sep 16, 2025
Dibromochloromethane 2944 Organic Chemical 2 of 13 results Aug 8, 2024 Aug 8, 2024
Dichloroacetic Acid 2451 Organic Chemical 2 of 14 results Sep 23, 2009 Jul 21, 2014
Monobromoacetic Acid 2453 Organic Chemical 1 of 14 results Oct 27, 2020 Oct 27, 2020
Monochloroacetic Acid 2450 Organic Chemical 1 of 14 results Aug 24, 2017 Aug 24, 2017

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 11–20 of 91 samples, newest first — collected August 8, 2023 to February 21, 2024. The summary above covers all 91.

27 results from the 10 samples listed here: 9 detected, 18 not detected. Across the whole record it is 128 of 285. 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 8 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.

Chemical and radiological sample results for Walker Switch Water Assn, every result from 11 to 20 of 91 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Feb 21, 2024 11:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-94840-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Mar 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 21, 2024 11:00, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2024 – Mar 31, 2024
Collected
Aug 29, 2023 13:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230830-008
Laboratory
MSDH Lab
5.8 ug/l , sample collected Aug 29, 2023 13:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Aug 29, 2023 13:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230830-007
Laboratory
MSDH Lab
1.09 ug/l , sample collected Aug 29, 2023 13:30, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Aug 8, 2023 06:45
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-230809-043
Laboratory
MSDH Lab
0.0043 mg/l , sample collected Aug 8, 2023 06:45, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 06:45, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 8, 2023 07:15
Sampling point
LC0018 Location withheld
Sample type
Routine
Lab sample
PB-230809-046
Laboratory
MSDH Lab
0.0075 mg/l , sample collected Aug 8, 2023 07:15, sampling point LC0018 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 07:15, sampling point LC0018 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 8, 2023 06:30
Sampling point
LC0019 Location withheld
Sample type
Routine
Lab sample
PB-230809-048
Laboratory
MSDH Lab
0.0017 mg/l , sample collected Aug 8, 2023 06:30, sampling point LC0019 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 06:30, sampling point LC0019 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 8, 2023 05:20
Sampling point
LC0013 Location withheld
Sample type
Routine
Lab sample
PB-230809-045
Laboratory
MSDH Lab
0.0061 mg/l , sample collected Aug 8, 2023 05:20, sampling point LC0013 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 05:20, sampling point LC0013 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 8, 2023 17:07
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-230809-050
Laboratory
MSDH Lab
0.0017 mg/l , sample collected Aug 8, 2023 17:07, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 17:07, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 8, 2023 05:00
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-230809-042
Laboratory
MSDH Lab
0.005 mg/l , sample collected Aug 8, 2023 05:00, sampling point LC0009 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 05:00, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 8, 2023 05:40
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-230809-047
Laboratory
MSDH Lab
0.001 mg/l , sample collected Aug 8, 2023 05:40, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 05:40, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023

Routine (10).