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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

MS0490010 , City of Winona

22 of the 59 analytes this system has been tested for have been detected at least once, across 280 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 280 samples on record, detections range from October 8, 2003 to December 3, 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 City of Winona, 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 182 of 184 results Jun 17, 2004 Aug 7, 2024
Lead 1030 Inorganic Chemical 81 of 184 results Jun 17, 2004 Aug 7, 2024
TTHM 2950 Organic Chemical 11 of 20 results Jul 21, 2004 Aug 14, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Oct 8, 2003 Apr 7, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 20 results Jun 16, 2010 Aug 14, 2025
Fluoride 1025 Inorganic Chemical 7 of 10 results Oct 8, 2003 Apr 7, 2025
Chloroform 2941 Organic Chemical 6 of 14 results Aug 12, 2013 Aug 14, 2025
Bromodichloromethane 2943 Organic Chemical 6 of 14 results Aug 12, 2013 Aug 14, 2025
Dibromochloromethane 2944 Organic Chemical 6 of 14 results Aug 12, 2013 Aug 14, 2025
Nickel 1036 Inorganic Chemical 5 of 10 results Mar 10, 2004 Apr 7, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 29, 2019 Dec 3, 2025
Dichloroacetic Acid 2451 Organic Chemical 3 of 15 results Aug 12, 2013 Aug 14, 2025
Chromium 1020 Inorganic Chemical 3 of 10 results Mar 7, 2016 Apr 7, 2025
Trichloroacetic Acid 2452 Organic Chemical 2 of 15 results Aug 12, 2013 Aug 14, 2025
Gross Beta Particle Activity 4100 Radionuclide 2 of 2 results Sep 25, 2009 Mar 15, 2010
Sulfate 1055 Inorganic Chemical 2 of 2 results Oct 8, 2003 Mar 10, 2004
Monobromoacetic Acid 2453 Organic Chemical 1 of 15 results Sep 22, 2020 Sep 22, 2020
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 7 results Mar 15, 2010 Mar 15, 2010
Radium-226 4020 Radionuclide 1 of 7 results Mar 15, 2010 Mar 15, 2010
Gross Alpha, Excl. Radon & U 4000 Radionuclide 1 of 2 results Sep 25, 2009 Sep 25, 2009
Gross Alpha Particle Activity 4109 Radionuclide 1 of 2 results Sep 25, 2009 Sep 25, 2009
Mercury 1035 Inorganic Chemical 1 of 10 results Apr 6, 2005 Apr 6, 2005

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 280 samples, newest first — collected September 12, 2018 to August 20, 2019. The summary above covers all 280.

33 results from the 10 samples listed here: 21 detected, 12 not detected. Across the whole record it is 343 of 915. 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 City of Winona, every result from 81 to 90 of 280 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
Aug 20, 2019 14:41
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
190821-026HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 20, 2019 14:41, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Aug 20, 2019 14:41, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2019 14:41, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2019 14:41, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2019 14:41, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Aug 20, 2019 14:41, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2019 – Dec 31, 2019
Collected
May 7, 2019 15:18
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
190509-004IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 15:18, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.067 mg/l , sample collected May 7, 2019 15:18, 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 May 7, 2019 15:18, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.0141 mg/l , sample collected May 7, 2019 15:18, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.104 mg/l , sample collected May 7, 2019 15:18, 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 May 7, 2019 15:18, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
0.0107 mg/l , sample collected May 7, 2019 15:18, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 7, 2019 15:18, 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 May 7, 2019 15:18, 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 May 7, 2019 15:18, 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 May 7, 2019 15:18, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2017 – Dec 31, 2019
Collected
Sep 12, 2018 07:43
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-032PB
Laboratory
MSDH Lab
0.3673 mg/l , sample collected Sep 12, 2018 07:43, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0009 mg/l , sample collected Sep 12, 2018 07:43, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 06:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-030PB
Laboratory
MSDH Lab
0.1724 mg/l , sample collected Sep 12, 2018 06:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0006 mg/l , sample collected Sep 12, 2018 06:45, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 06:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-029PB
Laboratory
MSDH Lab
0.1914 mg/l , sample collected Sep 12, 2018 06:15, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0044 mg/l , sample collected Sep 12, 2018 06:15, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 06:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-028PB
Laboratory
MSDH Lab
0.0329 mg/l , sample collected Sep 12, 2018 06:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0021 mg/l , sample collected Sep 12, 2018 06:45, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 10:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-027PB
Laboratory
MSDH Lab
0.2468 mg/l , sample collected Sep 12, 2018 10:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 12, 2018 10:00, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 08:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-026PB
Laboratory
MSDH Lab
0.2847 mg/l , sample collected Sep 12, 2018 08:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0038 mg/l , sample collected Sep 12, 2018 08:00, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 06:10
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-025PB
Laboratory
MSDH Lab
0.8864 mg/l , sample collected Sep 12, 2018 06:10, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0412 mg/l , sample collected Sep 12, 2018 06:10, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded
Collected
Sep 12, 2018 07:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
180913-024PB
Laboratory
MSDH Lab
0.105 mg/l , sample collected Sep 12, 2018 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Not recorded
0.0015 mg/l , sample collected Sep 12, 2018 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Not recorded

Routine (10).