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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 51–60 of 158 samples, newest first — collected January 23, 2018 to March 12, 2019. The summary above covers all 158.

28 results from the 10 samples listed here: 9 detected, 19 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 51 to 60 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
Mar 12, 2019 14:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
190313-006TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 TTHM 2950 Jan 1, 2019 – Dec 31, 2019
Collected
Mar 12, 2019 14:15
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
190313-008HA
Laboratory
MSDH Lab
0.004 mg/l , sample collected Mar 12, 2019 14:15, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Mar 12, 2019 14:15, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Mar 12, 2019 14:15, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2019 – Dec 31, 2019
Collected
Jan 22, 2019 11:40
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
190123-046NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 22, 2019 11:40, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 22, 2019 11:40, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 22, 2019 11:40, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Collected
Jun 26, 2018 10:00
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
180627-015RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 26, 2018 10:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2013 – Dec 31, 2021
Collected
Jun 13, 2018 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180614-093PB
Laboratory
MSDH Lab
0.0178 mg/l , sample collected Jun 13, 2018 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 13, 2018 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Jun 13, 2018 07:10
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180614-078PB
Laboratory
MSDH Lab
0.0081 mg/l , sample collected Jun 13, 2018 07:10, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 13, 2018 07:10, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Jun 13, 2018 06:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180614-077PB
Laboratory
MSDH Lab
0.0088 mg/l , sample collected Jun 13, 2018 06:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 13, 2018 06:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Jun 13, 2018 04:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180614-069PB
Laboratory
MSDH Lab
0.2036 mg/l , sample collected Jun 13, 2018 04:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
0.0012 mg/l , sample collected Jun 13, 2018 04:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Jun 13, 2018 05:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180614-066PB
Laboratory
MSDH Lab
0.0425 mg/l , sample collected Jun 13, 2018 05:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
0.0008 mg/l , sample collected Jun 13, 2018 05:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Jan 23, 2018 13:45
Sampling point
TF080 Treatment Plantt080
Sample type
Routine
Lab sample
180124-001NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 23, 2018 13:45, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 23, 2018 13:45, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 23, 2018 13:45, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018

Routine (10).