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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 391–397 of 397 samples, newest first — collected July 19, 1993 to July 19, 1993. The summary above covers all 397.

14 results from the 7 samples listed here: 4 detected, 10 not detected. 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 391 to 397 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
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-029L
Laboratory
MSDH Lab
0.181 mg/l , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
0.004 mg/l , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-027L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-026L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-013L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-012L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
0.001 mg/l , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-011L
Laboratory
MSDH Lab
0.154 mg/l , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded
Collected
Jul 19, 1993
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
930720-008L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jul 19, 1993, sampling point DS000 Lead 1030 Not recorded

Routine (7).