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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

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.

Every analyte ever detected for Town of Belmont, 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 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 71–80 of 319 samples, newest first — collected April 18, 2022 to October 11, 2022. The summary above covers all 319.

38 results from the 10 samples listed here: 9 detected, 29 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.

We withheld the location of 2 sampling points below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

Chemical and radiological sample results for Town of Belmont, every result from 71 to 80 of 319 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
Oct 11, 2022 11:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-221013-015
Laboratory
MSDH Lab
0.0093 mg/l , sample collected Oct 11, 2022 11:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 11, 2022 11:45, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Oct 11, 2022 09:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-221013-014
Laboratory
MSDH Lab
0.0049 mg/l , sample collected Oct 11, 2022 09:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 11, 2022 09:00, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Oct 11, 2022 14:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-221013-013
Laboratory
MSDH Lab
0.0093 mg/l , sample collected Oct 11, 2022 14:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 11, 2022 14:00, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Oct 11, 2022 13:20
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-221013-012
Laboratory
MSDH Lab
0.0018 mg/l , sample collected Oct 11, 2022 13:20, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 11, 2022 13:20, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Oct 11, 2022 14:35
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-221013-011
Laboratory
MSDH Lab
0.0036 mg/l , sample collected Oct 11, 2022 14:35, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 11, 2022 14:35, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2022 – Dec 31, 2022
Collected
Oct 3, 2022 13:10
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
CN-221004-015
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 3, 2022 13:10, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Sep 26, 2022 12:05
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
VO-220927-014
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Sep 26, 2022 12:05, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2022
Collected
Apr 18, 2022 07:10
Sampling point
WL008 Well W008
Sample type
Routine
Lab sample
PB-220419-043
Laboratory
MSDH Lab
0.0012 mg/l , sample collected Apr 18, 2022 07:10, sampling point WL008 Copper, Free 1022 EPA method 200.8 Not recorded
0.6 ug/l , sample collected Apr 18, 2022 07:10, sampling point WL008 Lead 1030 EPA method 200.8 Not recorded
Collected
Apr 18, 2022 07:45
Sampling point
LC0023 Location withheld
Sample type
Routine
Lab sample
PB-220419-001
Laboratory
MSDH Lab
0.0005 mg/l , sample collected Apr 18, 2022 07:45, sampling point LC0023 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 18, 2022 07:45, sampling point LC0023 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Collected
Apr 18, 2022 06:50
Sampling point
LC0022 Location withheld
Sample type
Routine
Lab sample
PB-220419-002
Laboratory
MSDH Lab
0.0041 mg/l , sample collected Apr 18, 2022 06:50, sampling point LC0022 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Apr 18, 2022 06:50, sampling point LC0022 Lead 1030 EPA method 200.8 Jan 1, 2022 – Jun 30, 2022

Routine (10).