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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 61–70 of 91 samples, newest first — collected September 7, 2011 to September 11, 2014. The summary above covers all 91.

27 results from the 10 samples listed here: 13 detected, 14 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.

Chemical and radiological sample results for Walker Switch Water Assn, every result from 61 to 70 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
Sep 11, 2014 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140916-037PB
Laboratory
MSDH Lab
0.0168 mg/l , sample collected Sep 11, 2014 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 11, 2014 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Sep 11, 2014 06:35
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140916-044PB
Laboratory
MSDH Lab
0.0158 mg/l , sample collected Sep 11, 2014 06:35, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0006 mg/l , sample collected Sep 11, 2014 06:35, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jul 21, 2014 03:25
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
140722-024TH
Laboratory
MSDH Lab
1.48 ug/l , sample collected Jul 21, 2014 03:25, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
1.48 ug/l , sample collected Jul 21, 2014 03:25, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2013 – Dec 31, 2015
Collected
Jul 21, 2014 03:25
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
140722-026HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Jul 21, 2014 03:25, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 21, 2014 03:25, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Jul 21, 2014 03:25, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2013 – Dec 31, 2015
Collected
Sep 7, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110908-014PB
Laboratory
MSDH Lab
0.0009 mg/l , sample collected Sep 7, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 7, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Sep 7, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110908-003PB
Laboratory
MSDH Lab
0.0263 mg/l , sample collected Sep 7, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 7, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Sep 7, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110908-012PB
Laboratory
MSDH Lab
0.0013 mg/l , sample collected Sep 7, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 7, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Sep 7, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110908-011PB
Laboratory
MSDH Lab
0.0027 mg/l , sample collected Sep 7, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 7, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Sep 7, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110908-004PB
Laboratory
MSDH Lab
0.0203 mg/l , sample collected Sep 7, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 7, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Sep 7, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110908-015PB
Laboratory
MSDH Lab
0.0759 mg/l , sample collected Sep 7, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 7, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011

Routine (10).