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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 241–250 of 280 samples, newest first — collected June 17, 2004 to June 17, 2004. The summary above covers all 280.

20 results from the 10 samples listed here: 11 detected, 9 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 241 to 250 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
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-198PB
Laboratory
MSDH Lab
0.0017 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-202PB
Laboratory
MSDH Lab
0.0017 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-199PB
Laboratory
MSDH Lab
0.0012 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-196PB
Laboratory
MSDH Lab
0.0011 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-153PB
Laboratory
MSDH Lab
0.0007 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-217PB
Laboratory
MSDH Lab
0.0024 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
0.0011 mg/l , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-144PB
Laboratory
MSDH Lab
0.0027 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-159PB
Laboratory
MSDH Lab
0.0012 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-156PB
Laboratory
MSDH Lab
0.0109 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Collected
Jun 17, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040618-216PB
Laboratory
MSDH Lab
0.0014 mg/l , sample collected Jun 17, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 17, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2002 – Dec 31, 2004

Routine (10).