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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

MS0440003 , Columbus Light & Water

22 of the 59 analytes this system has been tested for have been detected at least once, across 487 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 487 samples on record, detections range from July 16, 2002 to June 22, 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 Columbus Light & Water, 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 250 of 250 results Jun 17, 2004 Jun 27, 2024
Lead 1030 Inorganic Chemical 40 of 250 results Jun 17, 2004 Jun 27, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 34 of 53 results Mar 21, 2006 Apr 21, 2025
TTHM 2950 Organic Chemical 33 of 53 results Mar 8, 2004 Jun 22, 2026
Chloroform 2941 Organic Chemical 21 of 35 results Aug 1, 2006 Jun 22, 2026
Barium 1010 Inorganic Chemical 18 of 18 results Jul 16, 2002 Mar 10, 2025
Fluoride 1025 Inorganic Chemical 18 of 18 results Jul 16, 2002 Mar 10, 2025
Nickel 1036 Inorganic Chemical 10 of 18 results Jul 16, 2002 Mar 10, 2025
Monochloroacetic Acid 2450 Organic Chemical 10 of 32 results Nov 11, 2013 Jun 12, 2018
Dichloroacetic Acid 2451 Organic Chemical 10 of 32 results Aug 24, 2009 Jun 27, 2016
Bromodichloromethane 2943 Organic Chemical 9 of 35 results Aug 1, 2006 Jun 22, 2026
Monobromoacetic Acid 2453 Organic Chemical 5 of 32 results Aug 17, 2010 Jun 12, 2018
Sodium 1052 Inorganic Chemical 4 of 4 results Mar 2, 2022 Feb 10, 2025
Radium-226 4020 Radionuclide 4 of 8 results May 30, 2018 Sep 3, 2019
Chromium 1020 Inorganic Chemical 4 of 18 results Jul 16, 2002 Jul 9, 2012
Sulfate 1055 Inorganic Chemical 4 of 4 results Jul 16, 2002 Mar 10, 2004
Gross Alpha, Incl. Radon & U 4002 Radionuclide 2 of 4 results May 30, 2018 Sep 3, 2019
Combined Radium (-226 & -228) 4010 Radionuclide 2 of 8 results May 30, 2018 Sep 3, 2019
Radium-228 4030 Radionuclide 2 of 8 results May 30, 2018 Sep 3, 2019
Dibromochloromethane 2944 Organic Chemical 1 of 35 results Jun 22, 2026 Jun 22, 2026
Selenium 1045 Inorganic Chemical 1 of 18 results Mar 10, 2004 Mar 10, 2004
Benzene 2990 Organic Chemical 1 of 28 results Sep 18, 2002 Sep 18, 2002

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 111–120 of 487 samples, newest first — collected August 16, 2018 to September 3, 2019. The summary above covers all 487.

40 results from the 10 samples listed here: 13 detected, 27 not detected. Across the whole record it is 483 of 1,899. 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 Columbus Light & Water, every result from 111 to 120 of 487 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 3, 2019 09:11
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
4410137
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 1.1 pci/l Minimum Reporting Level , sample collected Sep 3, 2019 09:11, sampling point TF081 Gross Alpha, Incl. Radon & U 4002 EPA method 7110B Jan 1, 2019 – Dec 31, 2027
Collected
Sep 3, 2019 09:09
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
4410136
Laboratory
Eurofins Eaton Analytical South Bend in
2.32 pci/l , sample collected Sep 3, 2019 09:09, sampling point TF081 Combined Radium (-226 & -228) 4010 EPA method 7500-RA Not recorded
0.52 pci/l , sample collected Sep 3, 2019 09:09, sampling point TF081 Radium-226 4020 EPA method 7500-RAB Jan 1, 2019 – Dec 31, 2027
1.8 pci/l , sample collected Sep 3, 2019 09:09, sampling point TF081 Radium-228 4030 EPA method 7500-RAD Jan 1, 2019 – Dec 31, 2027
Collected
Jun 11, 2019 12:43
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
190612-003HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 11, 2019 12:43, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 11, 2019 12:43, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 11, 2019 12:43, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 11, 2019 12:43, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 11, 2019 12:43, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Jun 11, 2019 12:43, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2019 – Dec 31, 2019
Collected
Apr 9, 2019 12:55
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
190410-027IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Arsenic 1005 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.0132 mg/l , sample collected Apr 9, 2019 12:55, sampling point TF081 Barium 1010 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Cadmium 1015 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Chromium 1020 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.698 mg/l , sample collected Apr 9, 2019 12:55, sampling point TF081 Fluoride 1025 EPA method 300.0 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Mercury 1035 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.0007 mg/l , sample collected Apr 9, 2019 12:55, sampling point TF081 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Selenium 1045 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Antimony, Total 1074 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 12:55, sampling point TF081 Thallium, Total 1085 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Collected
Apr 9, 2019 13:37
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190410-026IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.008 mg/l , sample collected Apr 9, 2019 13:37, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.778 mg/l , sample collected Apr 9, 2019 13:37, sampling point TF080 Fluoride 1025 EPA method 300.0 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.0008 mg/l , sample collected Apr 9, 2019 13:37, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:37, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Collected
Apr 9, 2019 13:07
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
190410-022CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:07, sampling point TF081 Cyanide 1024 EPA method QC10204001X Jan 1, 2017 – Dec 31, 2019
Collected
Apr 9, 2019 13:39
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190410-021CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 9, 2019 13:39, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2017 – Dec 31, 2019
Collected
Aug 16, 2018 08:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180823-018PB
Laboratory
MSDH Lab
0.0142 mg/l , sample collected Aug 16, 2018 08:30, 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 Aug 16, 2018 08:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Aug 16, 2018 06:39
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180823-016PB
Laboratory
MSDH Lab
0.0062 mg/l , sample collected Aug 16, 2018 06:39, 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 Aug 16, 2018 06:39, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
Collected
Aug 16, 2018 08:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180823-009PB
Laboratory
MSDH Lab
0.0207 mg/l , sample collected Aug 16, 2018 08:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018
0.0006 mg/l , sample collected Aug 16, 2018 08:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2016 – Dec 31, 2018

Routine (10).