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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

MS0130018 , Golden Triangle Water Assn #1

39 of the 71 analytes this system has been tested for have been detected at least once, across 367 samples on record.

The other 32 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 367 samples on record, detections range from August 9, 1993 to August 19, 2025. 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 Golden Triangle Water Assn #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 128 of 149 results Aug 9, 1993 Aug 19, 2025
Lead 1030 Inorganic Chemical 103 of 150 results Aug 9, 1993 Aug 19, 2025
Barium 1010 Inorganic Chemical 32 of 32 results Sep 8, 2003 Feb 5, 2025
Fluoride 1025 Inorganic Chemical 32 of 33 results Sep 8, 2003 Feb 5, 2025
Chromium 1020 Inorganic Chemical 20 of 32 results Jan 26, 2004 Feb 5, 2025
Arsenic 1005 Inorganic Chemical 17 of 32 results Jan 26, 2004 Feb 5, 2025
Selenium 1045 Inorganic Chemical 16 of 32 results Sep 8, 2003 Feb 5, 2025
Nickel 1036 Inorganic Chemical 13 of 32 results Jan 26, 2004 May 20, 2019
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 12 of 17 results Jul 9, 2007 Mar 6, 2025
Sodium 1052 Inorganic Chemical 10 of 10 results Jan 17, 2014 Oct 30, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 12 results Mar 7, 2012 Oct 4, 2012
Dichloroacetic Acid 2451 Organic Chemical 9 of 14 results Dec 17, 2019 Mar 6, 2025
TTHM 2950 Organic Chemical 9 of 16 results May 10, 2004 Mar 6, 2025
Trichloroacetic Acid 2452 Organic Chemical 6 of 14 results Aug 21, 2024 Mar 6, 2025
Chloroform 2941 Organic Chemical 6 of 14 results May 20, 2024 Mar 6, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 4 of 65 results Feb 13, 2024 Feb 12, 2025
Dibromoacetic Acid 2454 Organic Chemical 4 of 14 results Aug 13, 2008 May 20, 2024
Nitrite 1041 Inorganic Chemical 3 of 65 results Feb 12, 2025 Feb 12, 2025
Monochloroacetic Acid 2450 Organic Chemical 3 of 14 results Dec 17, 2019 May 20, 2024
Bromoform 2942 Organic Chemical 3 of 14 results Aug 13, 2008 May 20, 2024
Cadmium 1015 Inorganic Chemical 3 of 32 results Feb 14, 2005 Jan 23, 2006
Xylenes, Total 2955 Organic Chemical 2 of 28 results Apr 14, 2020 Feb 28, 2024
Toluene 2991 Organic Chemical 2 of 28 results Apr 14, 2020 Feb 28, 2024
Nitrate 1040 Inorganic Chemical 2 of 65 results May 3, 2004 Feb 13, 2024
Monobromoacetic Acid 2453 Organic Chemical 1 of 14 results Dec 17, 2019 Dec 17, 2019
Calcium 1016 Inorganic Chemical 1 of 1 result Jan 17, 2014 Jan 17, 2014
Chloride 1017 Inorganic Chemical 1 of 1 result Jan 17, 2014 Jan 17, 2014
Magnesium 1031 Inorganic Chemical 1 of 1 result Jan 17, 2014 Jan 17, 2014
Manganese 1032 Inorganic Chemical 1 of 1 result Jan 17, 2014 Jan 17, 2014
Potassium 1042 Inorganic Chemical 1 of 1 result Jan 17, 2014 Jan 17, 2014
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
Color 1905 Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
PH 1925 Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
Alkalinity, Total 1927 Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Jan 17, 2014 Jan 17, 2014
Calculated Sodium NACA Water Quality 1 of 1 result Jan 17, 2014 Jan 17, 2014
Dibromochloromethane 2944 Organic Chemical 1 of 14 results Aug 13, 2008 Aug 13, 2008

Showing samples collected between September 26, 2024 and September 26, 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 21–30 of 31 samples, newest first — collected October 30, 2024 to February 12, 2025. The summary above covers all 31.

56 results from the 10 samples listed here: 24 detected, 32 not detected. Across the whole record it is 464 of 1,720. 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 2 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 Golden Triangle Water Assn #1, every result from 21 to 30 of 31 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
Feb 12, 2025 11:45
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
NI-250213-003
Laboratory
MSDH Lab
0.203 mg/l , sample collected Feb 12, 2025 11:45, 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 Feb 12, 2025 11:45, sampling point TF104 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.188 mg/l , sample collected Feb 12, 2025 11:45, sampling point TF104 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 12, 2025 12:55
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-250213-002
Laboratory
MSDH Lab
0.252 mg/l , sample collected Feb 12, 2025 12:55, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 12, 2025 12:55, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.249 mg/l , sample collected Feb 12, 2025 12:55, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 12, 2025 13:40
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250213-001
Laboratory
MSDH Lab
0.235 mg/l , sample collected Feb 12, 2025 13:40, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 12, 2025 13:40, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.227 mg/l , sample collected Feb 12, 2025 13:40, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 5, 2025 11:35
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250206-030
Laboratory
MSDH Lab
0.0027 mg/l , sample collected Feb 5, 2025 11:35, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.028 mg/l , sample collected Feb 5, 2025 11:35, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2025 11:35, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0023 mg/l , sample collected Feb 5, 2025 11:35, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
1.6 mg/l , sample collected Feb 5, 2025 11:35, sampling point TF103 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 Feb 5, 2025 11:35, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2025 11:35, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
0.0032 mg/l , sample collected Feb 5, 2025 11:35, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2025 11:35, sampling point TF103 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 Feb 5, 2025 11:35, sampling point TF103 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 Feb 5, 2025 11:35, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 5, 2025 11:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250206-029
Laboratory
MSDH Lab
0.0027 mg/l , sample collected Feb 5, 2025 11:00, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0286 mg/l , sample collected Feb 5, 2025 11:00, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2025 11:00, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0023 mg/l , sample collected Feb 5, 2025 11:00, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
1.61 mg/l , sample collected Feb 5, 2025 11:00, sampling point TF102 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 Feb 5, 2025 11:00, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2025 11:00, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
0.0032 mg/l , sample collected Feb 5, 2025 11:00, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2025 11:00, sampling point TF102 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 Feb 5, 2025 11:00, sampling point TF102 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 Feb 5, 2025 11:00, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jan 22, 2025 10:45
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
RU-250123-001
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jan 22, 2025 10:45, sampling point TF104 Combined Uranium 4006 EPA method 200.8 Jan 1, 2025 – Dec 31, 2033
Collected
Dec 11, 2024 10:20
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-131327-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.5 ug/l , sample collected Dec 11, 2024 10:20, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
2.5 ug/l , sample collected Dec 11, 2024 10:20, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
4 ug/l , sample collected Dec 11, 2024 10:20, sampling point SM2 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 11, 2024 10:20, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 10:20, sampling point SM2 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Dec 11, 2024 09:30
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-131327-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.5 ug/l , sample collected Dec 11, 2024 09:30, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
2.4 ug/l , sample collected Dec 11, 2024 09:30, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
3.9 ug/l , sample collected Dec 11, 2024 09:30, sampling point SM1 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 11, 2024 09:30, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 11, 2024 09:30, sampling point SM1 TTHM 2950 EPA method 524.2 Oct 1, 2024 – Dec 31, 2024
Collected
Oct 30, 2024 13:55
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
NA-241031-003
Laboratory
MSDH Lab
205 mg/l , sample collected Oct 30, 2024 13:55, sampling point TF104 Sodium 1052 EPA method 200.7 Jan 1, 2022 – Dec 31, 2024
Collected
Oct 30, 2024 14:40
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NA-241031-002
Laboratory
MSDH Lab
206 mg/l , sample collected Oct 30, 2024 14:40, sampling point TF103 Sodium 1052 EPA method 200.7 Jan 1, 2022 – Dec 31, 2024

Routine (10).