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; the list of samples further down is narrowed.

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

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The 7 samples collected between September 25, 2024 and September 25, 2026 are listed below, newest first.

38 results from the 7 samples listed here: 13 detected, 25 not detected. 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 City of Winona, every result from the 7 samples on record, 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 Dec 3, 2025 07:35 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample NA-251203-009 Laboratory MSDH Lab
4.02 mg/l , sample collected Dec 3, 2025 07:35, sampling point TF080	Sodium 1052 EPA method 200.7	Jan 1, 2023 – Dec 31, 2025
Collected Sep 17, 2025 07:46 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample CN-250917-021 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 17, 2025 07:46, sampling point TF080	Cyanide 1024 EPA method QC10204001X	Jan 1, 2023 – Dec 31, 2025
Collected Sep 17, 2025 07:38 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample IN-250917-025 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 17, 2025 07:38, sampling point TF080	Mercury 1035 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Collected Aug 14, 2025 10:00 Sampling point SM2 Location withheld Sample type Routine Lab sample 810-160092-1 Laboratory Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Aug 14, 2025 10:00, sampling point SM2	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
8.5 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
6 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 14, 2025 10:00, sampling point SM2	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 14, 2025 10:00, sampling point SM2	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
14.5 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Jan 1, 2025 – Dec 31, 2025
17 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 14, 2025 10:00, sampling point SM2	Bromoform 2942 EPA method 524.2	Not recorded
6.8 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	Bromodichloromethane 2943 EPA method 524.2	Not recorded
2.8 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	Dibromochloromethane 2944 EPA method 524.2	Not recorded
26.6 ug/l , sample collected Aug 14, 2025 10:00, sampling point SM2	TTHM 2950 EPA method 524.2	Jan 1, 2025 – Dec 31, 2025
Collected Apr 7, 2025 15:18 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample IN-250408-047 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 7, 2025 15:18, sampling point TF080	Arsenic 1005 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.0983 mg/l , sample collected Apr 7, 2025 15:18, sampling point TF080	Barium 1010 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 7, 2025 15:18, sampling point TF080	Cadmium 1015 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.0014 mg/l , sample collected Apr 7, 2025 15:18, sampling point TF080	Chromium 1020 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.12 mg/l , sample collected Apr 7, 2025 15:18, sampling point TF080	Fluoride 1025 EPA method QC 10-109-12-2-A	Jan 1, 2023 – Dec 31, 2025
0.0014 mg/l , sample collected Apr 7, 2025 15:18, sampling point TF080	Nickel 1036 EPA method 200.8	Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 7, 2025 15:18, sampling point TF080	Selenium 1045 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 7, 2025 15:18, sampling point TF080	Antimony, Total 1074 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 7, 2025 15:18, sampling point TF080	Beryllium, Total 1075 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 7, 2025 15:18, sampling point TF080	Thallium, Total 1085 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Collected Mar 25, 2025 15:10 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample NI-250326-045 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 15:10, sampling point TF080	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 15:10, sampling point TF080	Nitrate 1040 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 15:10, sampling point TF080	Nitrite 1041 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Collected Mar 17, 2025 13:52 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample IN-250318-075 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Arsenic 1005 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.0881 mg/l , sample collected Mar 17, 2025 13:52, sampling point TF080	Barium 1010 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Cadmium 1015 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Chromium 1020 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Fluoride 1025 EPA method QC 10-109-12-2-A	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Mercury 1035 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Nickel 1036 EPA method 200.8	Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Selenium 1045 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Antimony, Total 1074 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Beryllium, Total 1075 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 17, 2025 13:52, sampling point TF080	Thallium, Total 1085 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025

Collected
Dec 3, 2025 07:35

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
NA-251203-009

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Sodium 1052 EPA method 200.7
  
  Result
  4.02 mg/l
Collected
Sep 17, 2025 07:46

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
CN-250917-021

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Sep 17, 2025 07:38

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
IN-250917-025

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Mercury 1035 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Aug 14, 2025 10:00

Sampling point
SM2 Location withheld

Sample type
Routine

Lab sample
810-160092-1

Laboratory
Eurofins Eaton Analytical South Bend in
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  Not detected below 2 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  8.5 ug/l
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  6 ug/l
  
  Monitoring period
  Not recorded
- Monobromoacetic Acid 2453 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Dibromoacetic Acid 2454 EPA method 552.2
  
  Result
  Not detected below 1 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  14.5 ug/l
  
  Monitoring period
  Jan 1, 2025 – Dec 31, 2025
- Chloroform 2941 EPA method 524.2
  
  Result
  17 ug/l
  
  Monitoring period
  Not recorded
- Bromoform 2942 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Bromodichloromethane 2943 EPA method 524.2
  
  Result
  6.8 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  2.8 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950 EPA method 524.2
  
  Result
  26.6 ug/l
  
  Monitoring period
  Jan 1, 2025 – Dec 31, 2025
Collected
Apr 7, 2025 15:18

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
IN-250408-047

Laboratory
MSDH Lab
- Arsenic 1005 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Barium 1010 EPA method 200.8
  
  Result
  0.0983 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Cadmium 1015 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Chromium 1020 EPA method 200.8
  
  Result
  0.0014 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Fluoride 1025 EPA method QC 10-109-12-2-A
  
  Result
  0.12 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Nickel 1036 EPA method 200.8
  
  Result
  0.0014 mg/l
  
  Monitoring period
  Not recorded
- Selenium 1045 EPA method 200.8
  
  Result
  Not detected below 0.0025 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Antimony, Total 1074 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Beryllium, Total 1075 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Thallium, Total 1085 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 15:10

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
NI-250326-045

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Mar 17, 2025 13:52

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
IN-250318-075

Laboratory
MSDH Lab
- Arsenic 1005 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Barium 1010 EPA method 200.8
  
  Result
  0.0881 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Cadmium 1015 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Chromium 1020 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Fluoride 1025 EPA method QC 10-109-12-2-A
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Mercury 1035 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Nickel 1036 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Not recorded
- Selenium 1045 EPA method 200.8
  
  Result
  Not detected below 0.0025 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Antimony, Total 1074 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Beryllium, Total 1075 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Thallium, Total 1085 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025

Routine (7).