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.
| 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 281–290 of 359 samples, newest first — collected August 29, 2000 to May 15, 2001. The summary above covers all 359.
20 results from the 10 samples listed here: 19 detected, 1 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 0.012 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.017 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.071 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.094 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.025 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.112 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.127 mg/l , sample collected May 15, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected May 15, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.007 mg/l , sample collected Jan 23, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Jan 23, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.002 mg/l , sample collected Jan 23, 2001, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Jan 23, 2001, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.038 mg/l , sample collected Aug 29, 2000, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.001 mg/l , sample collected Aug 29, 2000, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-043L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.012 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-042L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.017 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-041L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.071 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-040L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.094 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-039L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.025 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-038L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.112 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- May 15, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010515-037L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.127 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Jan 23, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010123-008L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.007 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
-
- Collected
- Jan 23, 2001
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 010123-007L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.002 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Aug 29, 2000
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 000829-111L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.038 mg/l
-
Lead 1030
- Result
- 0.001 mg/l
Routine (10).