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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

MS0250001 , Town of Bolton

20 of the 55 analytes this system has been tested for have been detected at least once, across 359 samples on record.

The other 35 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 359 samples on record, detections range from April 27, 1994 to June 25, 2026. 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 Town of Bolton, 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 160 of 180 results Apr 27, 1994 Jun 30, 2023
Lead 1030 Inorganic Chemical 127 of 180 results Apr 27, 1994 Jun 30, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 23 of 24 results Aug 1, 2007 Jun 25, 2026
TTHM 2950 Organic Chemical 23 of 23 results Aug 1, 2007 Jun 25, 2026
Chloroform 2941 Organic Chemical 19 of 19 results Aug 1, 2007 Jun 25, 2026
Dichloroacetic Acid 2451 Organic Chemical 18 of 19 results Sep 22, 2008 Jun 25, 2026
Trichloroacetic Acid 2452 Organic Chemical 18 of 19 results Jul 19, 2012 Jun 25, 2026
Bromodichloromethane 2943 Organic Chemical 17 of 19 results Aug 1, 2007 Jun 25, 2026
Barium 1010 Inorganic Chemical 15 of 15 results Nov 15, 2004 Mar 6, 2024
Fluoride 1025 Inorganic Chemical 15 of 15 results Nov 15, 2004 Mar 6, 2024
Dibromochloromethane 2944 Organic Chemical 9 of 19 results Aug 1, 2007 May 5, 2025
Chromium 1020 Inorganic Chemical 7 of 15 results Mar 15, 2005 Apr 23, 2020
Selenium 1045 Inorganic Chemical 7 of 15 results Nov 15, 2004 May 10, 2017
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 25, 2019 Feb 7, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 21, 2011 Jul 13, 2012
Nickel 1036 Inorganic Chemical 4 of 15 results Mar 15, 2005 Dec 1, 2014
Dibromoacetic Acid 2454 Organic Chemical 3 of 19 results Aug 2, 2018 Aug 26, 2020
Monochloroacetic Acid 2450 Organic Chemical 2 of 19 results Jul 25, 2019 Aug 26, 2020
Nitrate-Nitrite 1038 Inorganic Chemical 2 of 41 results Feb 19, 2014 Feb 19, 2014
Nitrate 1040 Inorganic Chemical 2 of 41 results Feb 19, 2014 Feb 19, 2014

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 301–310 of 359 samples, newest first — collected June 28, 1995 to June 25, 1996. The summary above covers all 359.

20 results from the 10 samples listed here: 14 detected, 6 not detected. Across the whole record it is 482 of 2,029. 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 Town of Bolton, every result from 301 to 310 of 359 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 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-238L
Laboratory
MSDH Lab
0.364 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-237L
Laboratory
MSDH Lab
0.325 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
0.003 mg/l , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-236L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-235L
Laboratory
MSDH Lab
0.113 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
0.003 mg/l , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-234L
Laboratory
MSDH Lab
0.4 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-233L
Laboratory
MSDH Lab
0.085 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
0.002 mg/l , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-232L
Laboratory
MSDH Lab
0.11 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
0.003 mg/l , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-231L
Laboratory
MSDH Lab
0.152 mg/l , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
Not detected below 0.001 mg/l Method Detection Limit , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 25, 1996
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
960626-230L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jun 25, 1996, sampling point DS000 Copper, Free 1022 Not recorded
0.003 mg/l , sample collected Jun 25, 1996, sampling point DS000 Lead 1030 Not recorded
Collected
Jun 28, 1995
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
950628-330L
Laboratory
MSDH Lab
Not detected below 0.02 mg/l Method Detection Limit , sample collected Jun 28, 1995, sampling point DS000 Copper, Free 1022 Not recorded
0.003 mg/l , sample collected Jun 28, 1995, sampling point DS000 Lead 1030 Not recorded

Routine (10).