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
MS0710011 , Walker Switch Water Assn
10 of the 13 analytes this system has been tested for have been detected at least once, across 91 samples on record.
The other 3 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 91 samples on record, detections range from August 23, 2004 to September 16, 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 | 63 of 63 results | Aug 14, 2007 | Aug 8, 2023 |
| Lead 1030 | Inorganic Chemical | 25 of 63 results | Aug 14, 2007 | Sep 3, 2020 |
| TTHM 2950 | Organic Chemical | 14 of 18 results | Aug 23, 2004 | Sep 16, 2025 |
| Chloroform 2941 | Organic Chemical | 10 of 13 results | Sep 23, 2009 | Sep 16, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 6 of 19 results | Sep 23, 2009 | Aug 29, 2023 |
| Bromodichloromethane 2943 | Organic Chemical | 4 of 13 results | May 21, 2024 | Sep 16, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 2 of 13 results | Aug 8, 2024 | Aug 8, 2024 |
| Dichloroacetic Acid 2451 | Organic Chemical | 2 of 14 results | Sep 23, 2009 | Jul 21, 2014 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 14 results | Oct 27, 2020 | Oct 27, 2020 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 14 results | Aug 24, 2017 | Aug 24, 2017 |
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 21–30 of 91 samples, newest first — collected September 3, 2020 to August 8, 2023. The summary above covers all 91.
20 results from the 10 samples listed here: 9 detected, 11 not detected. Across the whole record it is 128 of 285. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
Units in this table
Lead is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.
Total Haloacetic Acids (Haa5) is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.
We withheld the location of 3 sampling points 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.0065 mg/l , sample collected Aug 8, 2023 05:30, sampling point LC0014 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2021 – Dec 31, 2023 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 05:30, sampling point LC0014 | Lead 1030 EPA method 200.8 | Jan 1, 2021 – Dec 31, 2023 |
|
||
| 0.0015 mg/l , sample collected Aug 8, 2023 06:00, sampling point LC0021 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2021 – Dec 31, 2023 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 06:00, sampling point LC0021 | Lead 1030 EPA method 200.8 | Jan 1, 2021 – Dec 31, 2023 |
|
||
| 0.0018 mg/l , sample collected Aug 8, 2023 05:52, sampling point LC0020 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2021 – Dec 31, 2023 |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 8, 2023 05:52, sampling point LC0020 | Lead 1030 EPA method 200.8 | Jan 1, 2021 – Dec 31, 2023 |
|
||
| 1.56 ug/l , sample collected Oct 18, 2022 13:15, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Not recorded |
|
||
| 1.2 ug/l , sample collected Oct 18, 2022 13:15, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 1, 2021 13:15, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Not recorded |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 1, 2021 13:15, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Not recorded |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Oct 27, 2020 13:52, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 27, 2020 13:52, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 27, 2020 13:52, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| 0.005 mg/l , sample collected Oct 27, 2020 13:52, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 27, 2020 13:52, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.005 mg/l , sample collected Oct 27, 2020 13:52, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Not recorded |
|
||
| 0.0311 mg/l , sample collected Sep 3, 2020, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 3, 2020, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.0187 mg/l , sample collected Sep 3, 2020 08:51, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 3, 2020 08:51, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
-
- Collected
- Aug 8, 2023 05:30
- Sampling point
- LC0014 Location withheld
- Sample type
- Routine
- Lab sample
- PB-230809-049
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2021 – Dec 31, 2023
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0065 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Aug 8, 2023 06:00
- Sampling point
- LC0021 Location withheld
- Sample type
- Routine
- Lab sample
- PB-230809-044
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2021 – Dec 31, 2023
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0015 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Aug 8, 2023 05:52
- Sampling point
- LC0020 Location withheld
- Sample type
- Routine
- Lab sample
- PB-230809-041
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2021 – Dec 31, 2023
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0018 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
-
- Collected
- Oct 18, 2022 13:15
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- HA-221019-017
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 1.56 ug/l
-
- Collected
- Oct 18, 2022 13:15
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- TH-221019-017
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 1.2 ug/l
-
- Collected
- Dec 1, 2021 13:15
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- HA-211202-018
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Dec 1, 2021 13:15
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- TH-211202-018
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
-
- Collected
- Oct 27, 2020 13:52
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 201028-013HA
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- 0.005 mg/l
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.005 mg/l
-
- Collected
- Sep 3, 2020
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200904-104PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0311 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Sep 3, 2020 08:51
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200904-107PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0187 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
Routine (10).