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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 151–160 of 238 samples, newest first — collected July 14, 2008 to April 13, 2009. The summary above covers all 238.

29 results from the 10 samples listed here: 14 detected, 15 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 151 to 160 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
Apr 13, 2009
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
090414-080NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Apr 13, 2009, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Apr 13, 2009, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Apr 13, 2009, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Apr 13, 2009
Sampling point
TF102
Sample type
Routine
Lab sample
090414-074NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Apr 13, 2009, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Apr 13, 2009, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Apr 13, 2009, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Sep 22, 2008
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
080923-030TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 22, 2008, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2008 – Dec 31, 2010
Collected
Sep 22, 2008
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
080923-010HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Sep 22, 2008, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 22, 2008, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected Sep 22, 2008, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2008 – Dec 31, 2010
Collected
Jul 14, 2008
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
080717-038PB
Laboratory
MSDH Lab
0.0231 mg/l , sample collected Jul 14, 2008, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0011 mg/l , sample collected Jul 14, 2008, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 14, 2008
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
080717-037PB
Laboratory
MSDH Lab
0.0032 mg/l , sample collected Jul 14, 2008, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 14, 2008, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 14, 2008
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
080717-036PB
Laboratory
MSDH Lab
0.0223 mg/l , sample collected Jul 14, 2008, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0102 mg/l , sample collected Jul 14, 2008, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 14, 2008
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
080717-035PB
Laboratory
MSDH Lab
0.0576 mg/l , sample collected Jul 14, 2008, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0006 mg/l , sample collected Jul 14, 2008, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 14, 2008
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
080717-034PB
Laboratory
MSDH Lab
0.0124 mg/l , sample collected Jul 14, 2008, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0038 mg/l , sample collected Jul 14, 2008, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Jul 14, 2008
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
080717-028PB
Laboratory
MSDH Lab
0.0091 mg/l , sample collected Jul 14, 2008, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0019 mg/l , sample collected Jul 14, 2008, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008

Routine (10).