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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

MS0240214 , McGill Wellworks, Inc

19 of the 57 analytes this system has been tested for have been detected at least once, across 238 samples on record.

The other 38 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 238 samples on record, detections range from October 4, 2000 to February 12, 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 McGill Wellworks, Inc, 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 77 of 99 results Oct 4, 2000 Dec 7, 2023
Lead 1030 Inorganic Chemical 52 of 99 results Jul 3, 2001 Dec 7, 2023
Barium 1010 Inorganic Chemical 22 of 22 results Sep 15, 2003 Feb 12, 2025
Fluoride 1025 Inorganic Chemical 21 of 22 results Sep 15, 2003 Feb 12, 2025
Chromium 1020 Inorganic Chemical 14 of 22 results Sep 15, 2003 Apr 22, 2020
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 10 results Jul 30, 2007 Feb 12, 2025
TTHM 2950 Organic Chemical 6 of 8 results Jun 28, 2004 Feb 12, 2025
Nickel 1036 Inorganic Chemical 6 of 22 results Dec 4, 2006 Apr 22, 2020
Arsenic 1005 Inorganic Chemical 5 of 22 results Apr 7, 2008 Jan 17, 2024
Sodium 1052 Inorganic Chemical 2 of 2 results Feb 24, 2021 Feb 24, 2021
Chloroform 2941 Organic Chemical 2 of 5 results Jul 30, 2007 Aug 1, 2018
Dichloroacetic Acid 2451 Organic Chemical 2 of 5 results Sep 17, 2014 Sep 17, 2014
Selenium 1045 Inorganic Chemical 2 of 22 results Mar 16, 2005 Feb 6, 2006
Sulfate 1055 Inorganic Chemical 2 of 2 results Sep 15, 2003 Feb 12, 2004
Monochloroacetic Acid 2450 Organic Chemical 1 of 5 results Aug 1, 2018 Aug 1, 2018
Monobromoacetic Acid 2453 Organic Chemical 1 of 5 results Sep 22, 2008 Sep 22, 2008
Dibromochloromethane 2944 Organic Chemical 1 of 5 results Jul 30, 2007 Jul 30, 2007
Cadmium 1015 Inorganic Chemical 1 of 22 results Mar 16, 2005 Mar 16, 2005
Cyanide 1024 Inorganic Chemical 1 of 17 results Sep 15, 2003 Sep 15, 2003

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 141–150 of 238 samples, newest first — collected August 9, 2010 to July 18, 2011. The summary above covers all 238.

41 results from the 10 samples listed here: 11 detected, 30 not detected. Across the whole record it is 226 of 1,240. 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 McGill Wellworks, Inc, every result from 141 to 150 of 238 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 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110722-100PB
Laboratory
MSDH Lab
0.3753 mg/l , sample collected Jul 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0031 mg/l , sample collected Jul 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110722-099PB
Laboratory
MSDH Lab
0.0105 mg/l , sample collected Jul 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0006 mg/l , sample collected Jul 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110722-086PB
Laboratory
MSDH Lab
0.0041 mg/l , sample collected Jul 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0006 mg/l , sample collected Jul 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
May 16, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110517-034IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0054 mg/l , sample collected May 16, 2011, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.223 mg/l , sample collected May 16, 2011, sampling point TF101 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Apr 25, 2011
Sampling point
TF102
Sample type
Routine
Lab sample
110426-006CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Apr 25, 2011, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2010 – Dec 31, 2012
Collected
Apr 18, 2011
Sampling point
TF102
Sample type
Routine
Lab sample
110419-041IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.009522 mg/l , sample collected Apr 18, 2011, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.127 mg/l , sample collected Apr 18, 2011, sampling point TF102 Fluoride 1025 EPA method 380-75WE Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.000715 mg/l , sample collected Apr 18, 2011, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 18, 2011, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Feb 7, 2011
Sampling point
TF102
Sample type
Routine
Lab sample
110208-055NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 7, 2011, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 7, 2011, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 7, 2011, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Feb 7, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110208-048NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 7, 2011, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 7, 2011, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 7, 2011, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Aug 9, 2010
Sampling point
TF102
Sample type
Routine
Lab sample
100810-049NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Aug 9, 2010, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Aug 9, 2010, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Aug 9, 2010, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Collected
Aug 9, 2010
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
100810-010NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Aug 9, 2010, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Aug 9, 2010, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Aug 9, 2010, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010

Routine (10).