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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.

Every analyte ever detected for Dorsey Water Association, 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 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 91–100 of 397 samples, newest first — collected June 1, 2022 to June 1, 2022. The summary above covers all 397.

20 results from the 10 samples listed here: 10 detected, 10 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.

We withheld the location of 10 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.

Chemical and radiological sample results for Dorsey Water Association, every result from 91 to 100 of 397 samples shown, 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
Jun 1, 2022 09:30
Sampling point
LC0013 Location withheld
Sample type
Routine
Lab sample
PB-220603-079
Laboratory
MSDH Lab
0.0291 mg/l , sample collected Jun 1, 2022 09:30, sampling point LC0013 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 09:30, sampling point LC0013 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 16:20
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-220603-078
Laboratory
MSDH Lab
0.0268 mg/l , sample collected Jun 1, 2022 16:20, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 16:20, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 08:00
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-220603-077
Laboratory
MSDH Lab
0.018 mg/l , sample collected Jun 1, 2022 08:00, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 08:00, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 16:30
Sampling point
LC0021 Location withheld
Sample type
Routine
Lab sample
PB-220603-076
Laboratory
MSDH Lab
0.0067 mg/l , sample collected Jun 1, 2022 16:30, sampling point LC0021 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 16:30, sampling point LC0021 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 16:00
Sampling point
LC0026 Location withheld
Sample type
Routine
Lab sample
PB-220603-075
Laboratory
MSDH Lab
0.0121 mg/l , sample collected Jun 1, 2022 16:00, sampling point LC0026 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 16:00, sampling point LC0026 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 16:00
Sampling point
LC0016 Location withheld
Sample type
Routine
Lab sample
PB-220603-074
Laboratory
MSDH Lab
0.007 mg/l , sample collected Jun 1, 2022 16:00, sampling point LC0016 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 16:00, sampling point LC0016 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 08:00
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-220603-073
Laboratory
MSDH Lab
0.0038 mg/l , sample collected Jun 1, 2022 08:00, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 08:00, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 13:00
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-220603-072
Laboratory
MSDH Lab
0.0213 mg/l , sample collected Jun 1, 2022 13:00, sampling point LC0008 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 13:00, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 08:00
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-220603-071
Laboratory
MSDH Lab
0.0048 mg/l , sample collected Jun 1, 2022 08:00, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 08:00, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Jun 1, 2022 15:50
Sampling point
LC0023 Location withheld
Sample type
Routine
Lab sample
PB-220603-030
Laboratory
MSDH Lab
0.0016 mg/l , sample collected Jun 1, 2022 15:50, sampling point LC0023 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 1, 2022 15:50, sampling point LC0023 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022

Routine (10).