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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

MS0030001 , Coles Water Association #1

18 of the 55 analytes this system has been tested for have been detected at least once, across 158 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 158 samples on record, detections range from April 14, 1994 to July 22, 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 Coles Water Association #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
Lead 1030 Inorganic Chemical 56 of 71 results Apr 14, 1994 Aug 13, 2024
Copper, Free 1022 Inorganic Chemical 51 of 71 results Apr 14, 1994 Aug 13, 2024
TTHM 2950 Organic Chemical 7 of 26 results May 3, 2004 Jul 22, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 27 results Jun 25, 2007 Mar 5, 2025
Bromodichloromethane 2943 Organic Chemical 5 of 20 results Jun 25, 2007 Jul 22, 2025
Dibromochloromethane 2944 Organic Chemical 5 of 20 results Jun 25, 2007 Jul 22, 2025
Arsenic 1005 Inorganic Chemical 5 of 5 results Apr 21, 2011 Jan 10, 2024
Barium 1010 Inorganic Chemical 5 of 5 results Apr 21, 2011 Jan 10, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 5, 2011 Jul 10, 2012
Combined Radium (-226 & -228) 4010 Radionuclide 5 of 5 results Dec 5, 2011 Jul 10, 2012
Radium-226 4020 Radionuclide 5 of 5 results Dec 5, 2011 Jul 10, 2012
Chloroform 2941 Organic Chemical 4 of 20 results Jun 25, 2007 Jul 22, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 18, 2019 Oct 16, 2024
Nickel 1036 Inorganic Chemical 2 of 5 results May 5, 2014 Jan 10, 2024
Monochloroacetic Acid 2450 Organic Chemical 2 of 20 results Mar 12, 2019 Apr 16, 2019
Fluoride 1025 Inorganic Chemical 1 of 5 results Jan 10, 2024 Jan 10, 2024
Chromium 1020 Inorganic Chemical 1 of 5 results May 5, 2014 May 5, 2014
Monobromoacetic Acid 2453 Organic Chemical 1 of 20 results Jun 8, 2010 Jun 8, 2010

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 81–90 of 158 samples, newest first — collected July 9, 2012 to July 8, 2013. The summary above covers all 158.

43 results from the 10 samples listed here: 12 detected, 31 not detected. Across the whole record it is 169 of 699. 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 Coles Water Association #1, every result from 81 to 90 of 158 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
Jul 8, 2013 05:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130710-068PB
Laboratory
MSDH Lab
0.0048 mg/l , sample collected Jul 8, 2013 05:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 8, 2013 05:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jul 8, 2013 06:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130710-067PB
Laboratory
MSDH Lab
0.0034 mg/l , sample collected Jul 8, 2013 06:15, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 8, 2013 06:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jul 8, 2013 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130710-066PB
Laboratory
MSDH Lab
0.0183 mg/l , sample collected Jul 8, 2013 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
0.0009 mg/l , sample collected Jul 8, 2013 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jul 8, 2013 07:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130710-065PB
Laboratory
MSDH Lab
0.0211 mg/l , sample collected Jul 8, 2013 07:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 8, 2013 07:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
Jul 8, 2013 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
130710-064PB
Laboratory
MSDH Lab
0.0076 mg/l , sample collected Jul 8, 2013 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 8, 2013 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2012 – Dec 31, 2014
Collected
May 20, 2013 10:30
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
130521-012VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2013 – Dec 31, 2013
Collected
Feb 20, 2013 10:00
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
130221-009NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 20, 2013 10:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 20, 2013 10:00, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 20, 2013 10:00, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2013 – Dec 31, 2013
Collected
Jul 10, 2012 12:00
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
201211210184
Laboratory
Radiation Safety Engineering
1.7 pci/l , sample collected Jul 10, 2012 12:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.3 pci/l , sample collected Jul 10, 2012 12:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
0.3 pci/l , sample collected Jul 10, 2012 12:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Jul 10, 2012 12:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 12:45
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
120710-036
Laboratory
Radiation Safety Engineering
1.7 pci/l , sample collected Jul 9, 2012 12:45, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
0.3 pci/l , sample collected Jul 9, 2012 12:45, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
0.3 pci/l , sample collected Jul 9, 2012 12:45, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.29 pci/l Minimum Reporting Level , sample collected Jul 9, 2012 12:45, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 9, 2012 12:45
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
120710-036RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 9, 2012 12:45, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012

Routine (10).