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
MS0710001 , Town of Belmont
17 of the 57 analytes this system has been tested for have been detected at least once, across 319 samples on record.
The other 40 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 319 samples on record, detections range from October 29, 2003 to November 18, 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.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 226 of 229 results | Aug 16, 2007 | Aug 25, 2025 |
| Lead 1030 | Inorganic Chemical | 116 of 229 results | Aug 16, 2007 | Aug 25, 2025 |
| TTHM 2950 | Organic Chemical | 11 of 20 results | Aug 23, 2004 | Nov 18, 2025 |
| Barium 1010 | Inorganic Chemical | 10 of 10 results | Oct 29, 2003 | Mar 31, 2025 |
| Nickel 1036 | Inorganic Chemical | 7 of 10 results | Oct 29, 2003 | Mar 31, 2025 |
| Chloroform 2941 | Organic Chemical | 6 of 15 results | Aug 22, 2016 | Nov 18, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 5 of 21 results | Sep 10, 2007 | Jul 8, 2024 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 5 of 5 results | Dec 12, 2011 | Jul 17, 2012 |
| Chromium 1020 | Inorganic Chemical | 2 of 10 results | Oct 29, 2003 | Mar 31, 2025 |
| Sodium 1052 | Inorganic Chemical | 2 of 2 results | Sep 17, 2019 | Mar 27, 2023 |
| Bromodichloromethane 2943 | Organic Chemical | 1 of 15 results | Aug 21, 2025 | Aug 21, 2025 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 15 results | Oct 27, 2020 | Oct 27, 2020 |
| Nitrite 1041 | Inorganic Chemical | 1 of 21 results | May 18, 2020 | May 18, 2020 |
| Xylenes, Total 2955 | Organic Chemical | 1 of 7 results | Sep 6, 2016 | Sep 6, 2016 |
| Dichloroacetic Acid 2451 | Organic Chemical | 1 of 15 results | Aug 22, 2016 | Aug 22, 2016 |
| Selenium 1045 | Inorganic Chemical | 1 of 10 results | Mar 1, 2010 | Mar 1, 2010 |
| Cadmium 1015 | Inorganic Chemical | 1 of 10 results | Oct 29, 2003 | Oct 29, 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 319 samples, newest first — collected July 16, 2012 to July 7, 2015. The summary above covers all 319.
42 results from the 10 samples listed here: 6 detected, 36 not detected. Across the whole record it is 397 of 993. 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 |
|---|---|---|
|
||
| 0.0787 mg/l , sample collected Jul 7, 2015 07:30, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2013 – Dec 31, 2015 |
| 0.0014 mg/l , sample collected Jul 7, 2015 07:30, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2013 – Dec 31, 2015 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 18, 2015 10:00, sampling point TF080 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2015 – Dec 31, 2015 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected May 18, 2015 10:00, sampling point TF080 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2015 – Dec 31, 2015 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 18, 2015 10:00, sampling point TF080 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2015 – Dec 31, 2015 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Nov 10, 2014 13:15, sampling point TF080 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2014 – Dec 31, 2014 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Nov 10, 2014 13:15, sampling point TF080 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2014 – Dec 31, 2014 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 10, 2014 13:15, sampling point TF080 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2014 – Dec 31, 2014 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 30, 2013 01:30, sampling point TF080 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2011 – Dec 31, 2013 |
|
||
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| Not detected below 4 ug/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jan 1, 2011 – Dec 31, 2013 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, 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 9, 2013 01:30, 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 9, 2013 01:30, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, 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 9, 2013 01:30, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Sep 9, 2013 01:30, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2011 – Dec 31, 2013 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:40, sampling point TF080 | Arsenic 1005 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.0086 mg/l , sample collected May 20, 2013 10:40, sampling point TF080 | 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 20, 2013 10:40, sampling point TF080 | 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 20, 2013 10:40, sampling point TF080 | Chromium 1020 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:40, sampling point TF080 | Fluoride 1025 EPA method 300.0 | Jan 1, 2011 – Dec 31, 2013 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:40, sampling point TF080 | Mercury 1035 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
| 0.0016 mg/l , sample collected May 20, 2013 10:40, sampling point TF080 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:40, sampling point TF080 | 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 20, 2013 10:40, sampling point TF080 | 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 20, 2013 10:40, sampling point TF080 | 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 20, 2013 10:40, sampling point TF080 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2011 – Dec 31, 2013 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 | Nitrate-Nitrite 1038 EPA method QC10107041C | Jan 1, 2013 – Dec 31, 2013 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 | Nitrate 1040 EPA method QC10107041C | Jan 1, 2013 – Dec 31, 2013 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected May 20, 2013 10:30, sampling point TF080 | Nitrite 1041 EPA method QC10107041C | Jan 1, 2013 – Dec 31, 2013 |
|
||
| 0.4 pci/l , sample collected Jul 17, 2012 02:00, sampling point TF080 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.254 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 02:00, sampling point TF080 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.254 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 02:00, sampling point TF080 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 02:00, sampling point TF080 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
|
||
| 0.4 pci/l , sample collected Jul 16, 2012 14:00, sampling point TF080 | Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 | Not recorded |
| Not detected below 0.254 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 14:00, sampling point TF080 | Combined Radium (-226 & -228) 4010 | Not recorded |
| Not detected below 0.254 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 14:00, sampling point TF080 | Radium-226 4020 EPA method 903.1 | Jul 1, 2012 – Sep 30, 2012 |
| Not detected below 0.22 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 14:00, sampling point TF080 | Radium-228 4030 EPA method 904.0 | Jul 1, 2012 – Sep 30, 2012 |
-
- Collected
- Jul 7, 2015 07:30
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 150708-021PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2013 – Dec 31, 2015
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0787 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0014 mg/l
-
- Collected
- May 18, 2015 10:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 150519-037NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2015 – Dec 31, 2015
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Nov 10, 2014 13:15
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 141111-036NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2014 – Dec 31, 2014
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Sep 30, 2013 01:30
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 131001-024CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Sep 9, 2013 01:30
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 130910-007TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- Not detected below 4 ug/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
- Collected
- Sep 9, 2013 01:30
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 130910-007HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- Not detected below 0.006 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
- Collected
- May 20, 2013 10:40
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 130521-037IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Barium 1010 EPA method 200.8
- Result
- 0.0086 mg/l
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Fluoride 1025 EPA method 300.0
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Nickel 1036 EPA method 200.8
- Result
- 0.0016 mg/l
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0025 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2011 – Dec 31, 2013
-
- Collected
- May 20, 2013 10:30
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 130521-030NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2013 – Dec 31, 2013
-
Nitrate-Nitrite 1038 EPA method QC10107041C
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method QC10107041C
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method QC10107041C
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Jul 17, 2012 02:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 201210150002
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 0.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.254 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.254 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.22 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
- Collected
- Jul 16, 2012 14:00
- Sampling point
- TF080 Treatment Plant T080
- Sample type
- Routine
- Lab sample
- 120717-023
- Laboratory
- Radiation Safety Engineering
-
Gross Alpha, Incl. Radon & U 4002 EPA method 00-02
- Result
- 0.4 pci/l
- Monitoring period
- Not recorded
-
Combined Radium (-226 & -228) 4010
- Result
- Not detected below 0.254 pci/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 903.1
- Result
- Not detected below 0.254 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
-
Radium-228 4030 EPA method 904.0
- Result
- Not detected below 0.22 pci/l Minimum Reporting Level
- Monitoring period
- Jul 1, 2012 – Sep 30, 2012
Routine (10).