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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

MS0510011 , City of Union

25 of the 62 analytes this system has been tested for have been detected at least once, across 240 samples on record.

The other 37 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 October 13, 2003 to June 11, 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 City of Union, 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 142 of 142 results Sep 6, 2007 Jul 29, 2024
Lead 1030 Inorganic Chemical 34 of 142 results Sep 6, 2007 Jul 29, 2024
TTHM 2950 Organic Chemical 27 of 27 results Jul 21, 2004 Jun 11, 2026
Chloroform 2941 Organic Chemical 20 of 20 results Sep 23, 2008 Jun 11, 2026
Bromodichloromethane 2943 Organic Chemical 20 of 20 results Sep 23, 2008 Jun 11, 2026
Dibromochloromethane 2944 Organic Chemical 18 of 20 results Sep 23, 2008 Jun 11, 2026
Fluoride 1025 Inorganic Chemical 11 of 11 results Oct 13, 2003 Mar 17, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Oct 13, 2003 Mar 17, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 10 of 26 results Nov 17, 2005 Jun 3, 2024
Nickel 1036 Inorganic Chemical 6 of 10 results Apr 4, 2005 Mar 17, 2025
Chromium 1020 Inorganic Chemical 5 of 10 results Oct 13, 2003 Mar 17, 2025
Dichloroacetic Acid 2451 Organic Chemical 5 of 20 results Sep 23, 2008 Sep 21, 2020
Sodium 1052 Inorganic Chemical 4 of 4 results Sep 12, 2019 Feb 24, 2025
Trichloroacetic Acid 2452 Organic Chemical 4 of 20 results Jun 14, 2011 Sep 21, 2020
Gross Alpha Particle Activity 4109 Radionuclide 4 of 4 results Sep 6, 2011 Apr 2, 2012
Sulfate 1055 Inorganic Chemical 3 of 3 results Oct 13, 2003 Oct 19, 2021
Calcium 1016 Inorganic Chemical 1 of 1 result Oct 19, 2021 Oct 19, 2021
Chloride 1017 Inorganic Chemical 1 of 1 result Oct 19, 2021 Oct 19, 2021
Conductivity @ 25 C Umhos/CM 1064 Water Quality 1 of 1 result Oct 19, 2021 Oct 19, 2021
Color 1905 Water Quality 1 of 1 result Oct 19, 2021 Oct 19, 2021
Alkalinity, Total 1927 Water Quality 1 of 1 result Oct 19, 2021 Oct 19, 2021
Monochloroacetic Acid 2450 Organic Chemical 1 of 20 results Jun 14, 2011 Jun 14, 2011
Dibromoacetic Acid 2454 Organic Chemical 1 of 20 results Sep 23, 2008 Sep 23, 2008
Bromoform 2942 Organic Chemical 1 of 20 results Sep 23, 2008 Sep 23, 2008
Selenium 1045 Inorganic Chemical 1 of 10 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

Choose a date range

The most recent samples, result by result

The table below lists 1–10 of 17 samples, newest first — collected September 22, 2025 to June 11, 2026. The summary above covers all 17.

100 results from the 10 samples listed here: 34 detected, 66 not detected. Across the whole record it is 332 of 883. 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 City of Union, every result from 1 to 10 of 17 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 11, 2026 09:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-195853-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
1.3 ug/l , sample collected Jun 11, 2026 09:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Jun 11, 2026 09:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.68 ug/l , sample collected Jun 11, 2026 09:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.08 ug/l , sample collected Jun 11, 2026 09:30, sampling point SM2 TTHM 2950 EPA method 524.2 Not recorded
Collected
Jun 11, 2026 09:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-195853-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
1.4 ug/l , sample collected Jun 11, 2026 09:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 11, 2026 09:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
1.2 ug/l , sample collected Jun 11, 2026 09:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.66 ug/l , sample collected Jun 11, 2026 09:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.26 ug/l , sample collected Jun 11, 2026 09:00, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 20, 2026 10:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-188761-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
1.5 ug/l , sample collected Apr 20, 2026 10:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
1.3 ug/l , sample collected Apr 20, 2026 10:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.86 ug/l , sample collected Apr 20, 2026 10:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.66 ug/l , sample collected Apr 20, 2026 10:30, sampling point SM2 TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 20, 2026 10:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-188761-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
1.6 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 20, 2026 10:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
1.3 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.9 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.8 ug/l , sample collected Apr 20, 2026 10:00, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Dec 4, 2025 08:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-174195-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2025 – Dec 31, 2025
0.54 ug/l , sample collected Dec 4, 2025 08:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
0.55 ug/l , sample collected Dec 4, 2025 08:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
1.09 ug/l , sample collected Dec 4, 2025 08:30, sampling point SM2 TTHM 2950 EPA method 524.2 Oct 1, 2025 – Dec 31, 2025
Collected
Dec 4, 2025 08:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-174195-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2025 – Dec 31, 2025
0.52 ug/l , sample collected Dec 4, 2025 08:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
0.5 ug/l , sample collected Dec 4, 2025 08:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 4, 2025 08:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
1.02 ug/l , sample collected Dec 4, 2025 08:00, sampling point SM1 TTHM 2950 EPA method 524.2 Oct 1, 2025 – Dec 31, 2025
Collected
Sep 25, 2025 11:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-165595-3
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2025 – Sep 30, 2025
1.4 ug/l , sample collected Sep 25, 2025 11:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 11:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Sep 25, 2025 11:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.74 ug/l , sample collected Sep 25, 2025 11:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.24 ug/l , sample collected Sep 25, 2025 11:00, sampling point SM1 TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
Sep 25, 2025 10:30
Sampling point
SM2 Location withheld
Sample type
Routine
Lab sample
810-165595-2
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2025 – Sep 30, 2025
1.4 ug/l , sample collected Sep 25, 2025 10:30, sampling point SM2 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:30, sampling point SM2 Bromoform 2942 EPA method 524.2 Not recorded
1.1 ug/l , sample collected Sep 25, 2025 10:30, sampling point SM2 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.75 ug/l , sample collected Sep 25, 2025 10:30, sampling point SM2 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.25 ug/l , sample collected Sep 25, 2025 10:30, sampling point SM2 TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
Sep 25, 2025 10:00
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-165595-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2025 – Sep 30, 2025
1.3 ug/l , sample collected Sep 25, 2025 10:00, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 25, 2025 10:00, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
1.2 ug/l , sample collected Sep 25, 2025 10:00, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
0.88 ug/l , sample collected Sep 25, 2025 10:00, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.38 ug/l , sample collected Sep 25, 2025 10:00, sampling point SM1 TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
Sep 22, 2025 10:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
CN-250923-007
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 22, 2025 10:00, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025

Routine (10).