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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

MS0090024 , Thorn Water Association

28 of the 57 analytes this system has been tested for have been detected at least once, across 419 samples on record.

The other 29 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 419 samples on record, detections range from November 30, 1993 to June 29, 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 Thorn Water Association, 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 115 of 149 results Nov 30, 1993 Jun 17, 2025
Lead 1030 Inorganic Chemical 99 of 149 results Nov 30, 1993 Jun 17, 2025
Barium 1010 Inorganic Chemical 31 of 31 results Mar 19, 2002 Jun 29, 2026
Fluoride 1025 Inorganic Chemical 31 of 31 results Mar 19, 2002 Jun 29, 2026
Xylenes, Total 2955 Organic Chemical 23 of 76 results Jul 6, 2004 Aug 2, 2010
Chromium 1020 Inorganic Chemical 17 of 31 results Mar 19, 2002 Jan 13, 2025
TTHM 2950 Organic Chemical 16 of 23 results Jul 11, 2007 Apr 20, 2026
Arsenic 1005 Inorganic Chemical 13 of 31 results Feb 14, 2005 Jan 9, 2024
Nickel 1036 Inorganic Chemical 11 of 29 results Feb 14, 2005 Apr 21, 2014
Bromoform 2942 Organic Chemical 10 of 18 results Dec 13, 2023 Apr 20, 2026
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 15 results Mar 5, 2012 Oct 3, 2012
Selenium 1045 Inorganic Chemical 9 of 31 results Jan 12, 2004 Mar 24, 2008
Dibromochloromethane 2944 Organic Chemical 8 of 18 results Dec 13, 2023 Apr 20, 2026
Sodium 1052 Inorganic Chemical 8 of 8 results Sep 23, 2019 Oct 14, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 7 of 23 results Jul 11, 2007 Feb 21, 2024
Nitrite 1041 Inorganic Chemical 4 of 65 results Jun 5, 2006 Nov 28, 2006
Ethylbenzene 2992 Organic Chemical 4 of 76 results Jul 6, 2004 Jan 26, 2005
Cyanide 1024 Inorganic Chemical 3 of 27 results Dec 4, 2006 May 2, 2018
Nitrate-Nitrite 1038 Inorganic Chemical 3 of 65 results May 3, 2004 Nov 28, 2006
Sulfate 1055 Inorganic Chemical 3 of 4 results Mar 19, 2002 Jan 12, 2004
Dibromoacetic Acid 2454 Organic Chemical 2 of 16 results Dec 13, 2023 Jul 30, 2024
Cadmium 1015 Inorganic Chemical 2 of 31 results Feb 14, 2005 Feb 14, 2005
Toluene 2991 Organic Chemical 2 of 76 results Jan 26, 2005 Jan 26, 2005
Dichloroacetic Acid 2451 Organic Chemical 1 of 16 results Feb 21, 2024 Feb 21, 2024
Trichloroacetic Acid 2452 Organic Chemical 1 of 16 results Feb 21, 2024 Feb 21, 2024
Monochloroacetic Acid 2450 Organic Chemical 1 of 16 results Jul 13, 2020 Jul 13, 2020
Monobromoacetic Acid 2453 Organic Chemical 1 of 16 results Jul 12, 2011 Jul 12, 2011
Nitrate 1040 Inorganic Chemical 1 of 65 results May 3, 2004 May 3, 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 1–10 of 23 samples, newest first — collected June 17, 2025 to June 29, 2026. The summary above covers all 23.

64 results from the 10 samples listed here: 16 detected, 48 not detected. Across the whole record it is 436 of 2,741. 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 7 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 Thorn Water Association, every result from 1 to 10 of 23 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 29, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35047253002
Laboratory
Pace Analytical Services, LLC
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
13.1 ug/l , sample collected Jun 29, 2026, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
0.82 mg/l , sample collected Jun 29, 2026, sampling point TF102 Fluoride 1025 EPA method 300.0 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Mercury 1035 EPA method 245.1 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Collected
Jun 29, 2026
Sampling point
TF103
Sample type
Routine
Lab sample
35047253001
Laboratory
Pace Analytical Services, LLC
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
60.2 ug/l , sample collected Jun 29, 2026, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
0.25 mg/l , sample collected Jun 29, 2026, sampling point TF103 Fluoride 1025 EPA method 300.0 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Mercury 1035 EPA method 245.1 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 29, 2026, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2023 – Dec 31, 2028
Collected
Apr 20, 2026 10:00
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-188926-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM2 Chloroform 2941 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
3.3 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM2 Bromoform 2942 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
1.6 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
4.9 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM2 TTHM 2950 EPA method 524.2 Jan 1, 2026 – Dec 31, 2026
Collected
Feb 2, 2026 10:40
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-179759-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 2, 2026 10:40, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 2, 2026 10:40, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 2, 2026 10:40, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 2, 2026 10:40, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 2, 2026 10:40, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 2 ug/l Minimum Reporting Level , sample collected Feb 2, 2026 10:40, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2026 – Dec 31, 2026
Collected
Jun 17, 2025 08:00
Sampling point
LC0018 Location withheld
Sample type
Routine
Lab sample
PB-250618-020
Laboratory
MSDH Lab
0.0733 mg/l , sample collected Jun 17, 2025 08:00, sampling point LC0018 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 17, 2025 08:00, sampling point LC0018 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 17, 2025 07:30
Sampling point
LC0014 Location withheld
Sample type
Routine
Lab sample
PB-250618-019
Laboratory
MSDH Lab
0.208 mg/l , sample collected Jun 17, 2025 07:30, sampling point LC0014 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
1.1 ug/l , sample collected Jun 17, 2025 07:30, sampling point LC0014 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 17, 2025 07:05
Sampling point
LC0024 Location withheld
Sample type
Routine
Lab sample
PB-250618-018
Laboratory
MSDH Lab
0.0962 mg/l , sample collected Jun 17, 2025 07:05, sampling point LC0024 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
2.6 ug/l , sample collected Jun 17, 2025 07:05, sampling point LC0024 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 17, 2025 02:30
Sampling point
LC0021 Location withheld
Sample type
Routine
Lab sample
PB-250618-017
Laboratory
MSDH Lab
0.132 mg/l , sample collected Jun 17, 2025 02:30, sampling point LC0021 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 17, 2025 02:30, sampling point LC0021 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 17, 2025 08:00
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-250618-016
Laboratory
MSDH Lab
0.11 mg/l , sample collected Jun 17, 2025 08:00, sampling point LC0008 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 17, 2025 08:00, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 17, 2025 07:45
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-250618-015
Laboratory
MSDH Lab
0.0355 mg/l , sample collected Jun 17, 2025 07:45, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.6 ug/l , sample collected Jun 17, 2025 07:45, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025

Routine (10).