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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

MS0100017 , Union W/A

43 of the 73 analytes this system has been tested for have been detected at least once, across 326 samples on record.

The other 30 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 326 samples on record, detections range from September 16, 1993 to January 21, 2025. 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 Union W/A, 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 117 of 136 results Sep 16, 1993 Sep 25, 2024
Lead 1030 Inorganic Chemical 53 of 136 results Sep 16, 1993 Jun 8, 2023
TTHM 2950 Organic Chemical 32 of 41 results Jul 12, 2004 Mar 21, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 26 of 39 results Jul 12, 2004 Mar 21, 2023
Chloroform 2941 Organic Chemical 23 of 24 results May 23, 2006 Jun 26, 2018
Bromodichloromethane 2943 Organic Chemical 21 of 24 results May 23, 2006 Jun 26, 2018
Dibromochloromethane 2944 Organic Chemical 18 of 24 results Jul 31, 2006 Jun 26, 2018
Barium 1010 Inorganic Chemical 16 of 16 results Mar 12, 2002 Jan 21, 2025
Dichloroacetic Acid 2451 Organic Chemical 14 of 18 results Aug 25, 2008 Jun 26, 2018
Fluoride 1025 Inorganic Chemical 13 of 17 results Mar 12, 2002 Jan 21, 2025
Trichloroacetic Acid 2452 Organic Chemical 12 of 18 results Aug 25, 2008 Jun 26, 2018
Chromium 1020 Inorganic Chemical 9 of 16 results Feb 14, 2005 Jan 12, 2021
Dibromoacetic Acid 2454 Organic Chemical 9 of 18 results Aug 25, 2008 Jun 26, 2018
Nickel 1036 Inorganic Chemical 7 of 16 results Mar 12, 2002 Jan 21, 2025
Sodium 1052 Inorganic Chemical 7 of 7 results Sep 29, 2017 Oct 16, 2024
Monobromoacetic Acid 2453 Organic Chemical 7 of 18 results Jan 28, 2008 Nov 6, 2017
Arsenic 1005 Inorganic Chemical 4 of 16 results Jan 23, 2006 Jan 12, 2021
Nitrite 1041 Inorganic Chemical 3 of 34 results Jan 10, 2022 Jan 23, 2023
Selenium 1045 Inorganic Chemical 3 of 16 results Feb 14, 2005 Jan 12, 2021
Monochloroacetic Acid 2450 Organic Chemical 3 of 18 results Oct 27, 2008 Nov 6, 2017
Gross Alpha, Incl. Radon & U 4002 Radionuclide 2 of 2 results Jun 6, 2014 Sep 23, 2014
Gross Alpha Particle Activity 4109 Radionuclide 2 of 4 results Jun 25, 2012 Sep 11, 2012
Bromoform 2942 Organic Chemical 2 of 24 results Jul 31, 2006 Aug 25, 2008
Cadmium 1015 Inorganic Chemical 2 of 16 results Feb 14, 2005 Jan 23, 2006
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 34 results Jan 22, 2018 Jan 22, 2018
Nitrate 1040 Inorganic Chemical 1 of 34 results Jan 22, 2018 Jan 22, 2018
Calcium 1016 Inorganic Chemical 1 of 1 result Sep 29, 2017 Sep 29, 2017
Chloride 1017 Inorganic Chemical 1 of 1 result Sep 29, 2017 Sep 29, 2017
Iron 1028 Inorganic Chemical 1 of 1 result Sep 29, 2017 Sep 29, 2017
Magnesium 1031 Inorganic Chemical 1 of 1 result Sep 29, 2017 Sep 29, 2017
Manganese 1032 Inorganic Chemical 1 of 1 result Sep 29, 2017 Sep 29, 2017
Potassium 1042 Inorganic Chemical 1 of 1 result Sep 29, 2017 Sep 29, 2017
Sulfate 1055 Inorganic Chemical 1 of 3 results Sep 29, 2017 Sep 29, 2017
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
Color 1905 Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
Alkalinity, Total 1927 Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
Calculated Sodium NACA Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
PH, Field Result PHFD Water Quality 1 of 1 result Sep 29, 2017 Sep 29, 2017
Carbon Tetrachloride 2982 Organic Chemical 1 of 27 results Oct 16, 2013 Oct 16, 2013
Xylenes, Total 2955 Organic Chemical 1 of 27 results Jun 25, 2012 Jun 25, 2012
Cyanide 1024 Inorganic Chemical 1 of 14 results Feb 14, 2005 Feb 14, 2005

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 21–30 of 326 samples, newest first — collected March 21, 2023 to March 12, 2024. The summary above covers all 326.

19 results from the 10 samples listed here: 8 detected, 11 not detected. Across the whole record it is 424 of 1,449. 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 Union W/A, every result from 21 to 30 of 326 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
Mar 12, 2024 07:45
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
HA-240313-012
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 12, 2024 07:45, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2024 – Dec 31, 2024
Collected
Feb 7, 2024 09:00
Sampling point
TF102 Treatment Facility TF102
Sample type
Routine
Lab sample
NI-240208-012
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 7, 2024 09:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 7, 2024 09:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 7, 2024 09:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Feb 7, 2024 08:35
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-240208-011
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 7, 2024 08:35, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 7, 2024 08:35, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 7, 2024 08:35, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Jun 8, 2023 05:30
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-230609-011
Laboratory
MSDH Lab
0.0801 mg/l , sample collected Jun 8, 2023 05:30, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.52 ug/l , sample collected Jun 8, 2023 05:30, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
Jun 7, 2023 05:30
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-230609-012
Laboratory
MSDH Lab
0.0167 mg/l , sample collected Jun 7, 2023 05:30, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 7, 2023 05:30, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
Jun 7, 2023 09:00
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
PB-230609-013
Laboratory
MSDH Lab
0.0379 mg/l , sample collected Jun 7, 2023 09:00, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 7, 2023 09:00, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
May 27, 2023 07:30
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230609-015
Laboratory
MSDH Lab
0.023 mg/l , sample collected May 27, 2023 07:30, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 27, 2023 07:30, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
May 27, 2023 06:20
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-230609-014
Laboratory
MSDH Lab
0.0765 mg/l , sample collected May 27, 2023 06:20, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
0.52 ug/l , sample collected May 27, 2023 06:20, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2023
Collected
May 17, 2023 09:46
Sampling point
TF102 Treatment Facility TF102
Sample type
Routine
Lab sample
RU-230518-009
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 17, 2023 09:46, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jan 1, 2015 – Dec 31, 2023
Collected
Mar 21, 2023 12:18
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-230322-007
Laboratory
MSDH Lab
3.7 ug/l , sample collected Mar 21, 2023 12:18, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023

Routine (10).