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 241–250 of 397 samples, newest first — collected May 10, 2011 to July 17, 2011. The summary above covers all 397.
27 results from the 10 samples listed here: 15 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 |
|---|---|---|
|
||
| 0.0119 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0174 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0091 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0685 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0237 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0171 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0293 mg/l , sample collected Jul 17, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 17, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| 0.0212 mg/l , sample collected Jul 16, 2011, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2011, sampling point DS000 | Lead 1030 EPA method 200.8 | Not recorded |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected May 10, 2011, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.04 mg/l , sample collected May 10, 2011, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.036 mg/l , sample collected May 10, 2011, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| 0.007 mg/l , sample collected May 10, 2011, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected May 10, 2011, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.08 mg/l , sample collected May 10, 2011, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Apr 1, 2011 – Jun 30, 2011 |
|
||
| 49.9 ug/l , sample collected May 10, 2011, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected May 10, 2011, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 3.33 ug/l , sample collected May 10, 2011, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected May 10, 2011, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 53.2 ug/l , sample collected May 10, 2011, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Apr 1, 2011 – Jun 30, 2011 |
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-044PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0119 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-043PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0174 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-042PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0091 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-041PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0685 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-040PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0237 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-038PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0171 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-037PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0293 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Jul 16, 2011
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 110719-039PB
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0212 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- May 10, 2011
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 110511-009HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.04 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.036 mg/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- 0.007 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
- 0.08 mg/l
- Monitoring period
- Apr 1, 2011 – Jun 30, 2011
-
- Collected
- May 10, 2011
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 110511-009TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 49.9 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
- 3.33 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 EPA method 524.2
- Result
- 53.2 ug/l
- Monitoring period
- Apr 1, 2011 – Jun 30, 2011
Routine (10).