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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 291–300 of 319 samples, newest first — collected August 16, 2007 to September 10, 2007. The summary above covers all 319.

23 results from the 10 samples listed here: 18 detected, 5 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.

Chemical and radiological sample results for Town of Belmont, every result from 291 to 300 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
Sep 10, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070911-015TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 10, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 10, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 10, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 10, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 10, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-294PB
Laboratory
MSDH Lab
0.6768 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0005 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-310PB
Laboratory
MSDH Lab
0.0459 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0013 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-311PB
Laboratory
MSDH Lab
1.2905 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0009 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-292PB
Laboratory
MSDH Lab
0.5258 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0016 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-308PB
Laboratory
MSDH Lab
0.9326 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-284PB
Laboratory
MSDH Lab
1.7813 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0009 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-309PB
Laboratory
MSDH Lab
0.1803 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0023 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-283PB
Laboratory
MSDH Lab
0.3533 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0028 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070817-293PB
Laboratory
MSDH Lab
2.2805 mg/l , sample collected Aug 16, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0015 mg/l , sample collected Aug 16, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008

Routine (10).