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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

MS0490016 , Hays Creek W/A-Minerva

23 of the 57 analytes this system has been tested for have been detected at least once, across 114 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 114 samples on record, detections range from October 8, 2003 to September 12, 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 Hays Creek W/A-Minerva, 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 35 of 35 results Sep 22, 2004 Sep 11, 2023
Lead 1030 Inorganic Chemical 25 of 35 results Sep 22, 2004 Jul 29, 2020
Barium 1010 Inorganic Chemical 9 of 9 results Oct 8, 2003 Mar 17, 2025
Fluoride 1025 Inorganic Chemical 9 of 9 results Oct 8, 2003 Mar 17, 2025
TTHM 2950 Organic Chemical 7 of 12 results Jul 19, 2004 Sep 12, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 10 results Jun 16, 2010 Jun 26, 2023
Chromium 1020 Inorganic Chemical 4 of 9 results Apr 4, 2005 May 6, 2019
Chloroform 2941 Organic Chemical 3 of 7 results Aug 27, 2007 Sep 12, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 16, 2019 Feb 24, 2025
Bromodichloromethane 2943 Organic Chemical 2 of 7 results Jul 13, 2016 Sep 12, 2025
Dichloroacetic Acid 2451 Organic Chemical 2 of 6 results Jul 13, 2016 Sep 11, 2019
Nickel 1036 Inorganic Chemical 2 of 9 results Apr 29, 2013 May 6, 2019
Monochloroacetic Acid 2450 Organic Chemical 1 of 6 results Sep 11, 2019 Sep 11, 2019
Monobromoacetic Acid 2453 Organic Chemical 1 of 6 results Sep 11, 2019 Sep 11, 2019
Trichloroacetic Acid 2452 Organic Chemical 1 of 6 results Jul 13, 2016 Jul 13, 2016
Dibromoacetic Acid 2454 Organic Chemical 1 of 6 results Jul 13, 2016 Jul 13, 2016
Dibromochloromethane 2944 Organic Chemical 1 of 7 results Jul 13, 2016 Jul 13, 2016
Gross Alpha Particle Activity 4109 Radionuclide 1 of 4 results Sep 11, 2012 Sep 11, 2012
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 4 results Dec 21, 2011 Dec 21, 2011
Radium-228 4030 Radionuclide 1 of 4 results Dec 21, 2011 Dec 21, 2011
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 22 results May 16, 2007 May 16, 2007
Nitrate 1040 Inorganic Chemical 1 of 22 results May 16, 2007 May 16, 2007
Selenium 1045 Inorganic Chemical 1 of 9 results Apr 4, 2005 Apr 4, 2005

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 5 samples collected between September 25, 2024 and September 25, 2026 are listed below, newest first.

27 results from the 5 samples listed here: 6 detected, 21 not detected. 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 Hays Creek W/A-Minerva, every result from the 5 samples on record, 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
Sep 15, 2025 10:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-250916-007
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 15, 2025 10:40, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Sep 12, 2025 12:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
810-163882-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Dec 31, 2025
0.8 ug/l , sample collected Sep 12, 2025 12:30, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
0.55 ug/l , sample collected Sep 12, 2025 12:30, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 12, 2025 12:30, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
1.35 ug/l , sample collected Sep 12, 2025 12:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Mar 24, 2025 11:45
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250325-065
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 11:45, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 11:45, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 24, 2025 11:45, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 17, 2025 12:50
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250318-061
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:50, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0107 mg/l , sample collected Mar 17, 2025 12:50, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:50, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:50, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.153 mg/l , sample collected Mar 17, 2025 12:50, sampling point TF101 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 Mar 17, 2025 12:50, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:50, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:50, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 12:50, sampling point TF101 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 Mar 17, 2025 12:50, sampling point TF101 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 Mar 17, 2025 12:50, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 13:10
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NA-250225-007
Laboratory
MSDH Lab
79.2 mg/l , sample collected Feb 24, 2025 13:10, sampling point TF101 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025

Routine (5).