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.
| 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 51–60 of 280 samples, newest first — collected August 16, 2021 to September 29, 2021. The summary above covers all 280.
19 results from the 10 samples listed here: 17 detected, 2 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 29, 2021 15:18, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2021 – Dec 31, 2021 |
|
||
| 2.23 mg/l , sample collected Aug 17, 2021 07:04, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 42.2 ug/l , sample collected Aug 17, 2021 07:04, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.232 mg/l , sample collected Aug 17, 2021 07:38, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 1.7 ug/l , sample collected Aug 17, 2021 07:38, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.0327 mg/l , sample collected Aug 17, 2021 07:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 17, 2021 07:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.56 mg/l , sample collected Aug 17, 2021 06:45, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 4.2 ug/l , sample collected Aug 17, 2021 06:45, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.0325 mg/l , sample collected Aug 17, 2021 07:10, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 3.2 ug/l , sample collected Aug 17, 2021 07:10, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.89 mg/l , sample collected Aug 16, 2021 16:25, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 1.5 ug/l , sample collected Aug 16, 2021 16:25, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.852 mg/l , sample collected Aug 16, 2021 16:04, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 1.9 ug/l , sample collected Aug 16, 2021 16:04, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.975 mg/l , sample collected Aug 16, 2021 06:30, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 2.7 ug/l , sample collected Aug 16, 2021 06:30, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
|
||
| 0.791 mg/l , sample collected Aug 16, 2021 07:20, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
| 1.6 ug/l , sample collected Aug 16, 2021 07:20, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2019 – Dec 31, 2021 |
-
- Collected
- Sep 29, 2021 15:18
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- TH-210930-017
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2021 – Dec 31, 2021
-
TTHM 2950 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Aug 17, 2021 07:04
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-012
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 2.23 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 42.2 ug/l
-
- Collected
- Aug 17, 2021 07:38
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-016
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.232 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 1.7 ug/l
-
- Collected
- Aug 17, 2021 07:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-011
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0327 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Aug 17, 2021 06:45
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-017
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.56 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 4.2 ug/l
-
- Collected
- Aug 17, 2021 07:10
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-013
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0325 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 3.2 ug/l
-
- Collected
- Aug 16, 2021 16:25
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-020
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.89 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 1.5 ug/l
-
- Collected
- Aug 16, 2021 16:04
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-026
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.852 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 1.9 ug/l
-
- Collected
- Aug 16, 2021 06:30
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-018
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.975 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 2.7 ug/l
-
- Collected
- Aug 16, 2021 07:20
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- PB-210818-015
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2019 – Dec 31, 2021
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.791 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 1.6 ug/l
Routine (10).