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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.

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

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 121–130 of 240 samples, newest first — collected January 23, 2014 to June 19, 2014. The summary above covers all 240.

77 results from the 10 samples listed here: 11 detected, 66 not detected. Across the whole record it is 345 of 1,051. 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 Simpson Water Association #1, every result from 121 to 130 of 240 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 19, 2014 06:35
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-003PB
Laboratory
MSDH Lab
0.2589 mg/l , sample collected Jun 19, 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 Jun 19, 2014 06:35, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 19, 2014 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-002PB
Laboratory
MSDH Lab
0.1528 mg/l , sample collected Jun 19, 2014 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0007 mg/l , sample collected Jun 19, 2014 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jun 18, 2014
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
140620-001PB
Laboratory
MSDH Lab
0.1295 mg/l , sample collected Jun 18, 2014, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0007 mg/l , sample collected Jun 18, 2014, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Apr 23, 2014 12:59
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
140424-061IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Arsenic 1005 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.0067 mg/l , sample collected Apr 23, 2014 12:59, sampling point TF105 Barium 1010 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Cadmium 1015 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Chromium 1020 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Fluoride 1025 EPA method 300.0 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Mercury 1035 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
0.001 mg/l , sample collected Apr 23, 2014 12:59, sampling point TF105 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Selenium 1045 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Antimony, Total 1074 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 12:59, sampling point TF105 Thallium, Total 1085 EPA method 200.8 Jan 1, 2013 – Dec 31, 2015
Collected
Apr 23, 2014 01:07
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
140424-060IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.0056 mg/l , sample collected Apr 23, 2014 01:07, sampling point TF104 Barium 1010 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Cadmium 1015 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Chromium 1020 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.103 mg/l , sample collected Apr 23, 2014 01:07, sampling point TF104 Fluoride 1025 EPA method 300.0 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Mercury 1035 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
0.001 mg/l , sample collected Apr 23, 2014 01:07, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Selenium 1045 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2014 01:07, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Jan 1, 2014 – Dec 31, 2016
Collected
Apr 17, 2014 12:43
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
140418-010VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Dichloromethane 2964 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Benzene 2990 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Toluene 2991 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 17, 2014 12:43, sampling point TF105 Styrene 2996 EPA method 524.2 Apr 1, 2014 – Jun 30, 2014
Collected
Mar 5, 2014 12:23
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
140306-006CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Mar 5, 2014 12:23, sampling point TF105 Cyanide 1024 EPA method QC10204001X Jan 1, 2013 – Dec 31, 2015
Collected
Jan 29, 2014 14:18
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
140130-005NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 29, 2014 14:18, sampling point TF105 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 29, 2014 14:18, sampling point TF105 Nitrate 1040 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 29, 2014 14:18, sampling point TF105 Nitrite 1041 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Collected
Jan 29, 2014 14:24
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
140130-002NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 29, 2014 14:24, sampling point TF104 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 29, 2014 14:24, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 29, 2014 14:24, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2014 – Dec 31, 2014
Collected
Jan 23, 2014 12:02
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
140124-005VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Dichloromethane 2964 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Benzene 2990 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Toluene 2991 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jan 23, 2014 12:02, sampling point TF105 Styrene 2996 EPA method 524.2 Jan 1, 2014 – Mar 31, 2014

Routine (10).