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 351–359 of 359 samples, newest first — collected April 27, 1994 to April 27, 1994. The summary above covers all 359.
18 results from the 9 samples listed here: 9 detected, 9 not detected. 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 |
|---|---|---|
|
||
| 0.3 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.311 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.297 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.084 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.002 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| 0.112 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| Not detected below 0.001 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
|
||
| Not detected below 0.02 mg/l Method Detection Limit , sample collected Apr 27, 1994, sampling point DS000 | Copper, Free 1022 | Not recorded |
| 0.003 mg/l , sample collected Apr 27, 1994, sampling point DS000 | Lead 1030 | Not recorded |
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-009L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.3 mg/l
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-008L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.311 mg/l
-
Lead 1030
- Result
- 0.003 mg/l
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-007L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-006L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.297 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-005L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.084 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-004L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- 0.002 mg/l
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-003L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-002L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- 0.112 mg/l
-
Lead 1030
- Result
- Not detected below 0.001 mg/l Method Detection Limit
-
- Collected
- Apr 27, 1994
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 940429-001L
- Laboratory
- MSDH Lab
- Monitoring period
- Not recorded
-
Copper, Free 1022
- Result
- Not detected below 0.02 mg/l Method Detection Limit
-
Lead 1030
- Result
- 0.003 mg/l
Routine (9).