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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

MS0100008 , Simpson Water Association #1

24 of the 58 analytes this system has been tested for have been detected at least once, across 240 samples on record.

The other 34 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 240 samples on record, detections range from July 28, 1993 to April 20, 2026. These figures cover the whole record; the list of samples further down is narrowed.

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 Simpson Water Association #1, 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 107 of 109 results Jul 28, 1993 Jun 10, 2025
Lead 1030 Inorganic Chemical 90 of 109 results Jul 28, 1993 Jun 10, 2025
TTHM 2950 Organic Chemical 16 of 20 results May 17, 2004 Apr 20, 2026
Barium 1010 Inorganic Chemical 15 of 15 results Sep 15, 2003 Jan 15, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 13 of 20 results Jul 10, 2007 Apr 20, 2026
Chloroform 2941 Organic Chemical 11 of 15 results Jul 10, 2007 Apr 20, 2026
Bromodichloromethane 2943 Organic Chemical 11 of 15 results Jul 10, 2007 Apr 20, 2026
Fluoride 1025 Inorganic Chemical 11 of 15 results Jan 14, 2004 Jan 8, 2024
Dibromochloromethane 2944 Organic Chemical 10 of 15 results Jul 10, 2007 Apr 20, 2026
Dichloroacetic Acid 2451 Organic Chemical 8 of 14 results Aug 11, 2008 Apr 20, 2026
Nickel 1036 Inorganic Chemical 8 of 15 results Jan 14, 2004 Jan 8, 2024
Trichloroacetic Acid 2452 Organic Chemical 7 of 14 results Aug 11, 2008 Apr 20, 2026
Chromium 1020 Inorganic Chemical 7 of 15 results Sep 15, 2003 Jan 15, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 17, 2019 Oct 15, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 6 of 6 results Dec 8, 2011 Nov 20, 2013
Combined Radium (-226 & -228) 4010 Radionuclide 5 of 7 results Dec 8, 2011 Jul 12, 2012
Radium-226 4020 Radionuclide 5 of 7 results Dec 8, 2011 Jul 12, 2012
Selenium 1045 Inorganic Chemical 2 of 15 results Mar 2, 2005 Mar 24, 2008
Sulfate 1055 Inorganic Chemical 2 of 2 results Sep 15, 2003 Jan 14, 2004
Dibromoacetic Acid 2454 Organic Chemical 1 of 14 results Jul 16, 2020 Jul 16, 2020
Gross Alpha Particle Activity 4109 Radionuclide 1 of 1 result Sep 11, 2013 Sep 11, 2013
Bromoform 2942 Organic Chemical 1 of 15 results Jul 10, 2007 Jul 10, 2007
Cadmium 1015 Inorganic Chemical 1 of 15 results Mar 2, 2005 Mar 2, 2005
Arsenic 1005 Inorganic Chemical 1 of 15 results Jan 14, 2004 Jan 14, 2004

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.

Show every sample on record

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The most recent samples, result by result

The table below lists 11–20 of 20 samples, newest first — collected October 15, 2024 to June 10, 2025. The summary above covers all 20.

45 results from the 10 samples listed here: 6 detected, 39 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.

Chemical and radiological sample results for Simpson Water Association #1, every result from 11 to 20 of 20 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
Jun 10, 2025 04:00
Sampling point
LC021 Location withheld
Sample type
Routine
Lab sample
PB-250611-093
Laboratory
MSDH Lab
0.184 mg/l , sample collected Jun 10, 2025 04:00, sampling point LC021 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
1 ug/l , sample collected Jun 10, 2025 04:00, sampling point LC021 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
May 20, 2025 12:20
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
CN-250521-013
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected May 20, 2025 12:20, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Jan 28, 2025 14:20
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
NI-250129-020
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 28, 2025 14:20, sampling point TF105 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 28, 2025 14:20, sampling point TF105 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 28, 2025 14:20, sampling point TF105 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Jan 28, 2025 14:00
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
NI-250129-019
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 28, 2025 14:00, sampling point TF104 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 28, 2025 14:00, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 28, 2025 14:00, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Jan 15, 2025 12:30
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
IN-250116-030
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0042 mg/l , sample collected Jan 15, 2025 12:30, sampling point TF104 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0012 mg/l , sample collected Jan 15, 2025 12:30, sampling point TF104 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 15, 2025 12:30, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Dec 3, 2024 14:15
Sampling point
SM3 Location withheld
Sample type
Routine
Lab sample
810-130369-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:15, sampling point SM3 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Dec 3, 2024 14:30
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
810-130369-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2024 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 3, 2024 14:30, sampling point SM4 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Oct 28, 2024 11:00
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
CN-241029-009
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 28, 2024 11:00, sampling point TF105 Cyanide 1024 EPA method QC10204001X Jan 1, 2022 – Dec 31, 2024
Collected
Oct 15, 2024 14:30
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
NA-241017-014
Laboratory
MSDH Lab
69.6 mg/l , sample collected Oct 15, 2024 14:30, sampling point TF104 Sodium 1052 EPA method 200.7 Jan 1, 2022 – Dec 31, 2024
Collected
Oct 15, 2024 14:45
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
NA-241017-015
Laboratory
MSDH Lab
68.9 mg/l , sample collected Oct 15, 2024 14:45, sampling point TF105 Sodium 1052 EPA method 200.7 Jan 1, 2022 – Dec 31, 2024

Routine (10).