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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 231–240 of 397 samples, newest first — collected July 17, 2011 to May 2, 2012. The summary above covers all 397.

48 results from the 10 samples listed here: 32 detected, 16 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.

Chemical and radiological sample results for Dorsey Water Association, every result from 231 to 240 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
May 2, 2012 02:53
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120503-006TH
Laboratory
MSDH Lab
40.3 ug/l , sample collected May 2, 2012 02:53, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 2, 2012 02:53, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
7.7 ug/l , sample collected May 2, 2012 02:53, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.04 ug/l , sample collected May 2, 2012 02:53, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
49 ug/l , sample collected May 2, 2012 02:53, sampling point MRT000 TTHM 2950 EPA method 524.2 Apr 1, 2012 – Jun 30, 2012
Collected
May 2, 2012 02:53
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120503-006HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected May 2, 2012 02:53, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.027 mg/l , sample collected May 2, 2012 02:53, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.018 mg/l , sample collected May 2, 2012 02:53, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected May 2, 2012 02:53, 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 2, 2012 02:53, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.045 mg/l , sample collected May 2, 2012 02:53, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Apr 1, 2012 – Jun 30, 2012
Collected
Feb 14, 2012 02:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120215-008TH
Laboratory
MSDH Lab
40.6 ug/l , sample collected Feb 14, 2012 02:00, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 14, 2012 02:00, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
3.78 ug/l , sample collected Feb 14, 2012 02:00, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 14, 2012 02:00, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
44.4 ug/l , sample collected Feb 14, 2012 02:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 14, 2012 02:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
120215-008HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Feb 14, 2012 02:00, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.038 mg/l , sample collected Feb 14, 2012 02:00, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.028 mg/l , sample collected Feb 14, 2012 02:00, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Feb 14, 2012 02:00, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Feb 14, 2012 02:00, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.066 mg/l , sample collected Feb 14, 2012 02:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2012 – Mar 31, 2012
Collected
Nov 14, 2011 03:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
111115-018TH
Laboratory
MSDH Lab
32.2 ug/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 14, 2011 03:30, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
7.6 ug/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.13 ug/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
40.9 ug/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Oct 1, 2011 – Dec 31, 2011
Collected
Nov 14, 2011 03:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
111115-003HA
Laboratory
MSDH Lab
0.005 mg/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.017 mg/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.022 mg/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Nov 14, 2011 03:30, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Nov 14, 2011 03:30, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.044 mg/l , sample collected Nov 14, 2011 03:30, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Oct 1, 2011 – Dec 31, 2011
Collected
Aug 15, 2011 02:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110816-010TH
Laboratory
MSDH Lab
36.2 ug/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 15, 2011 02:30, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
6.8 ug/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
1.09 ug/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
44.1 ug/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jul 1, 2011 – Sep 30, 2011
Collected
Aug 15, 2011 02:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110816-020HA
Laboratory
MSDH Lab
0.005 mg/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.053 mg/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.021 mg/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.009 mg/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 15, 2011 02:30, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.088 mg/l , sample collected Aug 15, 2011 02:30, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jul 1, 2011 – Sep 30, 2011
Collected
Jul 17, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110719-046PB
Laboratory
MSDH Lab
0.0065 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
Collected
Jul 17, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110719-045PB
Laboratory
MSDH Lab
0.0485 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

Routine (10).