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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 101–110 of 487 samples, newest first — collected September 3, 2019 to January 25, 2021. The summary above covers all 487.

24 results from the 10 samples listed here: 2 detected, 22 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.

We withheld the location of 1 sampling point 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 Columbus Light & Water, every result from 101 to 110 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
Jan 25, 2021 13:04
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
TH-210126-003
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jan 25, 2021 13:04, sampling point SM4 TTHM 2950 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Collected
Jan 25, 2021 13:05
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
HA-210126-003
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jan 25, 2021 13:05, sampling point SM4 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Apr 6, 2020 12:20
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
200407-033NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 6, 2020 12:20, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 6, 2020 12:20, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2020 12:20, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Collected
Apr 6, 2020 12:45
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
200407-032NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 6, 2020 12:45, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 6, 2020 12:45, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2020 12:45, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2020 – Dec 31, 2020
Collected
Mar 3, 2020 13:19
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
200304-001TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 3, 2020 13:19, sampling point SM4 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 3, 2020 13:19, sampling point SM4 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 3, 2020 13:19, sampling point SM4 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Mar 3, 2020 13:19, sampling point SM4 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Mar 3, 2020 13:19, sampling point SM4 TTHM 2950 Jan 1, 2020 – Dec 31, 2020
Collected
Nov 13, 2019 13:25
Sampling point
TF081 Treatment Plant T081
Sample type
Routine
Lab sample
191114-013NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 13, 2019 13:25, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 13, 2019 13:25, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 13, 2019 13:25, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Collected
Nov 13, 2019 13:54
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
191114-012NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 13, 2019 13:54, 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 Nov 13, 2019 13:54, 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 Nov 13, 2019 13:54, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2019 – Dec 31, 2019
Collected
Sep 4, 2019
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
041923731-0001
Laboratory
Emsl Analytical, Inc.
Not detected below 0.52 mfl Minimum Reporting Level , sample collected Sep 4, 2019, sampling point DS000 Asbestos 1094 EPA method 100.2 Not recorded
Collected
Sep 3, 2019 10:23
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
4410139
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Sep 3, 2019 10:23, sampling point TF080 Combined Radium (-226 & -228) 4010 EPA method 7500-RA Not recorded
0.33 pci/l , sample collected Sep 3, 2019 10:23, sampling point TF080 Radium-226 4020 EPA method 7500-RAB Jan 1, 2019 – Dec 31, 2027
Not detected below 0.4 pci/l Minimum Reporting Level , sample collected Sep 3, 2019 10:23, sampling point TF080 Radium-228 4030 EPA method 7500-RAD Jan 1, 2019 – Dec 31, 2027
Collected
Sep 3, 2019 10:19
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
4410138
Laboratory
Eurofins Eaton Analytical South Bend in
0.76 pci/l , sample collected Sep 3, 2019 10:19, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 7110B Jan 1, 2019 – Dec 31, 2027

Routine (10).