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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

MS0410033 , Old Union Water System

22 of the 57 analytes this system has been tested for have been detected at least once, across 412 samples on record.

The other 35 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 412 samples on record, detections range from October 1, 2003 to February 10, 2026. 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 Old Union Water System, 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 156 of 156 results Aug 28, 2007 Sep 19, 2025
Lead 1030 Inorganic Chemical 66 of 156 results Aug 28, 2007 Sep 19, 2025
Barium 1010 Inorganic Chemical 30 of 30 results Oct 1, 2003 Mar 12, 2025
Fluoride 1025 Inorganic Chemical 23 of 30 results Oct 1, 2003 Mar 12, 2025
Nickel 1036 Inorganic Chemical 12 of 30 results Mar 1, 2004 Mar 12, 2025
Chromium 1020 Inorganic Chemical 11 of 30 results Oct 1, 2003 Apr 20, 2015
Selenium 1045 Inorganic Chemical 10 of 30 results Oct 1, 2003 Feb 25, 2009
Arsenic 1005 Inorganic Chemical 9 of 30 results Apr 1, 2019 Mar 12, 2025
Sodium 1052 Inorganic Chemical 9 of 9 results Sep 23, 2019 Feb 18, 2025
TTHM 2950 Organic Chemical 8 of 25 results Aug 23, 2007 May 14, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 7 of 25 results Sep 30, 2009 Feb 10, 2026
Xylenes, Total 2955 Organic Chemical 6 of 66 results Feb 9, 2004 Aug 25, 2014
Dibromochloromethane 2944 Organic Chemical 5 of 20 results Oct 6, 2020 May 14, 2025
Monochloroacetic Acid 2450 Organic Chemical 4 of 20 results Aug 23, 2007 Feb 10, 2026
Bromoform 2942 Organic Chemical 4 of 20 results Oct 6, 2020 May 14, 2025
Bromodichloromethane 2943 Organic Chemical 4 of 20 results Oct 6, 2020 Jan 6, 2025
Sulfate 1055 Inorganic Chemical 4 of 6 results Oct 1, 2003 Mar 1, 2004
Ethylbenzene 2992 Organic Chemical 3 of 66 results Sep 20, 2005 Mar 8, 2006
Chloroform 2941 Organic Chemical 2 of 20 results Oct 6, 2020 Sep 9, 2024
Carbon Tetrachloride 2982 Organic Chemical 1 of 66 results Jun 21, 2022 Jun 21, 2022
Cadmium 1015 Inorganic Chemical 1 of 30 results Feb 25, 2009 Feb 25, 2009
Dichloromethane 2964 Organic Chemical 1 of 66 results Aug 9, 2004 Aug 9, 2004

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 241–250 of 412 samples, newest first — collected April 3, 2012 to September 4, 2012. The summary above covers all 412.

49 results from the 10 samples listed here: 8 detected, 41 not detected. Across the whole record it is 376 of 2,552. 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 Old Union Water System, every result from 241 to 250 of 412 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
Sep 4, 2012 03:55
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120905-010CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Sep 4, 2012 03:55, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jul 11, 2012 02:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120712-031IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.08259 mg/l , sample collected Jul 11, 2012 02:00, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00244 mg/l , sample collected Jul 11, 2012 02:00, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.118 mg/l , sample collected Jul 11, 2012 02:00, sampling point TF103 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 02:00, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Jul 11, 2012 01:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120712-030IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.03125 mg/l , sample collected Jul 11, 2012 01:30, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.155 mg/l , sample collected Jul 11, 2012 01:30, sampling point TF101 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:30, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Jul 11, 2012 01:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120712-029IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.11089 mg/l , sample collected Jul 11, 2012 01:45, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00138 mg/l , sample collected Jul 11, 2012 01:45, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.116 mg/l , sample collected Jul 11, 2012 01:45, sampling point TF102 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 11, 2012 01:45, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Apr 3, 2012 13:20
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120404-019
Laboratory
Radiation Safety Engineering
Not detected below 0.6 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:20, sampling point TF103 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:20, sampling point TF103 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.6 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:20, sampling point TF103 Radium-228 4030 EPA method 904 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:20, sampling point TF103 Gross Alpha Particle Activity 4109 EPA method 00-02 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 3, 2012 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120404-008
Laboratory
Radiation Safety Engineering
Not detected below 0.6 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:00, sampling point TF102 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:00, sampling point TF102 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.6 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:00, sampling point TF102 Radium-228 4030 EPA method 904 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 13:00, sampling point TF102 Gross Alpha Particle Activity 4109 EPA method 00-02 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 3, 2012 14:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120404-018
Laboratory
Radiation Safety Engineering
Not detected below 0.5 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 14:40, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.3 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 14:40, sampling point TF101 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.5 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 14:40, sampling point TF101 Radium-228 4030 EPA method 904 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Apr 3, 2012 14:40, sampling point TF101 Gross Alpha Particle Activity 4109 EPA method 00-02 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 3, 2012 13:20
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
120404-019RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 3, 2012 13:20, sampling point TF103 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 3, 2012 14:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120404-018RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 3, 2012 14:40, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 3, 2012 13:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
120404-008RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 3, 2012 13:00, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012

Routine (10).