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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 131–140 of 240 samples, newest first — collected July 11, 2012 to November 20, 2013. The summary above covers all 240.

45 results from the 10 samples listed here: 8 detected, 37 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 131 to 140 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
Nov 20, 2013 12:02
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
201402280109GA
Laboratory
Radiation Safety Engineering
1 pci/l , sample collected Nov 20, 2013 12:02, sampling point TF105 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Oct 1, 2013 – Dec 31, 2013
Collected
Nov 20, 2013 12:02
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
201402280109
Laboratory
Radiation Safety Engineering
Not detected below 0.41 pci/l Minimum Reporting Level , sample collected Nov 20, 2013 12:02, sampling point TF105 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.2 pci/l Minimum Reporting Level , sample collected Nov 20, 2013 12:02, sampling point TF105 Radium-226 4020 EPA method 903.1 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.41 pci/l Minimum Reporting Level , sample collected Nov 20, 2013 12:02, sampling point TF105 Radium-228 4030 EPA method 904 Oct 1, 2013 – Dec 31, 2013
Collected
Nov 20, 2013 12:04
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
131122-002RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 20, 2013 12:04, sampling point TF105 Combined Uranium 4006 EPA method 200.8 Oct 1, 2013 – Dec 31, 2013
Collected
Nov 12, 2013 12:26
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
131114-030NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 12, 2013 12:26, sampling point TF105 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 12, 2013 12:26, sampling point TF105 Nitrate 1040 EPA method QC10107041C Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 12, 2013 12:26, sampling point TF105 Nitrite 1041 EPA method QC10107041C Jan 1, 2013 – Dec 31, 2013
Collected
Oct 15, 2013 12:41
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
131016-005VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Dichloromethane 2964 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Benzene 2990 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Toluene 2991 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 15, 2013 12:41, sampling point TF105 Styrene 2996 EPA method 524.2 Oct 1, 2013 – Dec 31, 2013
Collected
Sep 11, 2013 12:05
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
201309260155
Laboratory
Radiation Safety Engineering
Not detected below 0.36 pci/l Minimum Reporting Level , sample collected Sep 11, 2013 12:05, sampling point TF105 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.281 pci/l Minimum Reporting Level , sample collected Sep 11, 2013 12:05, sampling point TF105 Radium-226 4020 EPA method 903.1 Jul 1, 2013 – Sep 30, 2013
Not detected below 0.36 pci/l Minimum Reporting Level , sample collected Sep 11, 2013 12:05, sampling point TF105 Radium-228 4030 EPA method 904 Jul 1, 2013 – Sep 30, 2013
0.8 pci/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 11, 2013 12:05, sampling point TF105 Gross Alpha Particle Activity 4109 EPA method 00-02 Not recorded
Collected
Sep 11, 2013 12:17
Sampling point
TF105 Treatment Facility TF105
Sample type
Routine
Lab sample
130912-002RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 11, 2013 12:17, sampling point TF105 Combined Uranium 4006 EPA method 200.8 Jul 1, 2013 – Sep 30, 2013
Collected
Jan 23, 2013 12:23
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
130124-096NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 23, 2013 12:23, sampling point TF104 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 23, 2013 12:23, sampling point TF104 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 23, 2013 12:23, sampling point TF104 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Jul 12, 2012 12:26
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
201211120275
Laboratory
Radiation Safety Engineering
0.5 pci/l , sample collected Jul 12, 2012 12:26, sampling point TF104 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.3 pci/l , sample collected Jul 12, 2012 12:26, sampling point TF104 Combined Radium (-226 & -228) 4010 Not recorded
0.3 pci/l , sample collected Jul 12, 2012 12:26, sampling point TF104 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.25 pci/l Minimum Reporting Level , sample collected Jul 12, 2012 12:26, sampling point TF104 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 11, 2012 13:42
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
120712-037
Laboratory
Radiation Safety Engineering
0.5 pci/l , sample collected Jul 11, 2012 13:42, sampling point TF104 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.3 pci/l , sample collected Jul 11, 2012 13:42, sampling point TF104 Combined Radium (-226 & -228) 4010 Not recorded
0.3 pci/l , sample collected Jul 11, 2012 13:42, sampling point TF104 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.25 pci/l Minimum Reporting Level , sample collected Jul 11, 2012 13:42, sampling point TF104 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012

Routine (10).