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
MS0290002 , Dorsey Water Association
11 of the 14 analytes this system has been tested for have been detected at least once, across 397 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 397 samples on record, detections range from July 19, 1993 to November 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 | 151 of 200 results | Jul 19, 1993 | Sep 23, 2025 |
| TTHM 2950 | Organic Chemical | 100 of 100 results | Jun 7, 2004 | Nov 3, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 97 of 97 results | Aug 16, 2004 | Nov 3, 2025 |
| Chloroform 2941 | Organic Chemical | 70 of 70 results | May 15, 2006 | Nov 3, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 70 of 70 results | May 15, 2006 | Nov 3, 2025 |
| Trichloroacetic Acid 2452 | Organic Chemical | 65 of 65 results | Oct 22, 2007 | Nov 3, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 64 of 65 results | Oct 22, 2007 | Nov 3, 2025 |
| Monochloroacetic Acid 2450 | Organic Chemical | 37 of 65 results | Jan 22, 2008 | Jun 16, 2020 |
| Lead 1030 | Inorganic Chemical | 29 of 200 results | Jul 19, 1993 | Jun 24, 2020 |
| Dibromochloromethane 2944 | Organic Chemical | 21 of 70 results | Aug 7, 2006 | Nov 3, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 9 of 65 results | May 10, 2011 | Jun 16, 2020 |
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 121–130 of 397 samples, newest first — collected April 17, 2019 to June 24, 2020. The summary above covers all 397.
33 results from the 10 samples listed here: 21 detected, 12 not detected. Across the whole record it is 713 of 1,203. 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 |
|---|---|---|
|
||
| 0.0007 mg/l , sample collected Jun 24, 2020 05:00, 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 Jun 24, 2020 05:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.0286 mg/l , sample collected Jun 24, 2020 05:00, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
| 0.0006 mg/l , sample collected Jun 24, 2020 05:00, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.0007 mg/l , sample collected Jun 24, 2020 05:40, 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 Jun 24, 2020 05:40, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.0041 mg/l , sample collected Jun 24, 2020 06:30, 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 Jun 24, 2020 06:30, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.0073 mg/l , sample collected Jun 24, 2020 05:15, 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 Jun 24, 2020 05:15, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2018 – Dec 31, 2020 |
|
||
| 0.002 mg/l , sample collected Jun 16, 2020, sampling point DS000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.042 mg/l , sample collected Jun 16, 2020, sampling point DS000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.029 mg/l , sample collected Jun 16, 2020, sampling point DS000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| 0.003 mg/l , sample collected Jun 16, 2020, sampling point DS000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 16, 2020, sampling point DS000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.076 mg/l , sample collected Jun 16, 2020, sampling point DS000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2020 – Dec 31, 2020 |
|
||
| 61 ug/l , sample collected Jun 16, 2020 14:40, sampling point DS000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 16, 2020 14:40, sampling point DS000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 9.26 ug/l , sample collected Jun 16, 2020 14:40, sampling point DS000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 16, 2020 14:40, sampling point DS000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 70 ug/l , sample collected Jun 16, 2020 14:40, sampling point DS000 | TTHM 2950 | Jan 1, 2020 – Dec 31, 2020 |
|
||
| Not detected below 0.53 mfl Minimum Reporting Level , sample collected Dec 16, 2019, sampling point DS000 | Asbestos 1094 EPA method 100.2 | Not recorded |
|
||
| 47.8 ug/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 6.04 ug/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 53.8 ug/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | TTHM 2950 | Jan 1, 2019 – Dec 31, 2019 |
|
||
| 0.006 mg/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.023 mg/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.018 mg/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.047 mg/l , sample collected Apr 17, 2019 15:00, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2019 – Dec 31, 2019 |
-
- Collected
- Jun 24, 2020 05:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200625-141PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0007 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 24, 2020 05:00
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200625-140PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0286 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0006 mg/l
-
- Collected
- Jun 24, 2020 05:40
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200625-139PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0007 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 24, 2020 06:30
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200625-138PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0041 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 24, 2020 05:15
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200625-137PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2018 – Dec 31, 2020
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0073 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jun 16, 2020
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200617-001HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- 0.002 mg/l
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.042 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.029 mg/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- 0.003 mg/l
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.076 mg/l
- Monitoring period
- Jan 1, 2020 – Dec 31, 2020
-
- Collected
- Jun 16, 2020 14:40
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 200617-001TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 61 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 9.26 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- 70 ug/l
- Monitoring period
- Jan 1, 2020 – Dec 31, 2020
-
- Collected
- Dec 16, 2019
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 041923648-0001
- Laboratory
- Emsl Analytical, Inc.
- Monitoring period
- Not recorded
-
Asbestos 1094 EPA method 100.2
- Result
- Not detected below 0.53 mfl Minimum Reporting Level
-
- Collected
- Apr 17, 2019 15:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 190418-008TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 47.8 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 6.04 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- 53.8 ug/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2019
-
- Collected
- Apr 17, 2019 15:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 190418-008HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- 0.006 mg/l
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.023 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.018 mg/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.047 mg/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2019
Routine (10).