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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

MS0480007 , Hamilton Water District

20 of the 57 analytes this system has been tested for have been detected at least once, across 450 samples on record.

The other 37 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 450 samples on record, detections range from October 20, 2003 to September 22, 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 Hamilton Water District, 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 280 of 283 results Sep 5, 2007 Jul 31, 2024
Lead 1030 Inorganic Chemical 59 of 283 results Sep 5, 2007 Jul 20, 2021
Barium 1010 Inorganic Chemical 21 of 21 results Oct 20, 2003 Mar 10, 2025
Nickel 1036 Inorganic Chemical 18 of 21 results Oct 20, 2003 Mar 10, 2025
TTHM 2950 Organic Chemical 14 of 17 results Aug 29, 2007 Sep 22, 2025
Chloroform 2941 Organic Chemical 10 of 13 results Aug 12, 2013 Sep 22, 2025
Bromodichloromethane 2943 Organic Chemical 10 of 13 results Aug 12, 2013 Sep 22, 2025
Dibromochloromethane 2944 Organic Chemical 10 of 13 results Aug 12, 2013 Sep 22, 2025
Chromium 1020 Inorganic Chemical 9 of 21 results Oct 20, 2003 Feb 5, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 20 results Jul 8, 2010 May 22, 2024
Dichloroacetic Acid 2451 Organic Chemical 6 of 15 results Jul 8, 2010 Sep 22, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 16, 2019 Feb 25, 2025
Sulfate 1055 Inorganic Chemical 6 of 6 results Oct 20, 2003 Mar 10, 2004
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 10 results Mar 12, 2012 Oct 11, 2012
Beryllium, Total 1075 Inorganic Chemical 5 of 21 results Oct 20, 2003 Jan 13, 2010
Bromoform 2942 Organic Chemical 1 of 13 results Sep 22, 2025 Sep 22, 2025
Fluoride 1025 Inorganic Chemical 1 of 21 results Mar 10, 2025 Mar 10, 2025
Selenium 1045 Inorganic Chemical 1 of 21 results Jan 13, 2010 Jan 13, 2010
Thallium, Total 1085 Inorganic Chemical 1 of 21 results Jan 13, 2010 Jan 13, 2010
Arsenic 1005 Inorganic Chemical 1 of 21 results Oct 20, 2003 Oct 20, 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 21–30 of 450 samples, newest first — collected July 31, 2024 to July 31, 2024. The summary above covers all 450.

20 results from the 10 samples listed here: 10 detected, 10 not detected. Across the whole record it is 472 of 1,593. 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 10 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 Hamilton Water District, every result from 21 to 30 of 450 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
Jul 31, 2024 09:49
Sampling point
LC015 Location withheld
Sample type
Routine
Lab sample
PB-240802-039
Laboratory
MSDH Lab
0.0745 mg/l , sample collected Jul 31, 2024 09:49, sampling point LC015 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 09:49, sampling point LC015 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:20
Sampling point
LC020 Location withheld
Sample type
Routine
Lab sample
PB-240802-040
Laboratory
MSDH Lab
0.0921 mg/l , sample collected Jul 31, 2024 10:20, sampling point LC020 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:20, sampling point LC020 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:12
Sampling point
LC017 Location withheld
Sample type
Routine
Lab sample
PB-240802-034
Laboratory
MSDH Lab
0.202 mg/l , sample collected Jul 31, 2024 10:12, sampling point LC017 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:12, sampling point LC017 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:10
Sampling point
LC018 Location withheld
Sample type
Routine
Lab sample
PB-240802-044
Laboratory
MSDH Lab
0.105 mg/l , sample collected Jul 31, 2024 10:10, sampling point LC018 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:10, sampling point LC018 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:06
Sampling point
LC019 Location withheld
Sample type
Routine
Lab sample
PB-240802-043
Laboratory
MSDH Lab
0.0776 mg/l , sample collected Jul 31, 2024 10:06, sampling point LC019 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:06, sampling point LC019 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:04
Sampling point
LC011 Location withheld
Sample type
Routine
Lab sample
PB-240802-046
Laboratory
MSDH Lab
0.153 mg/l , sample collected Jul 31, 2024 10:04, sampling point LC011 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:04, sampling point LC011 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 11:00
Sampling point
LC024 Location withheld
Sample type
Routine
Lab sample
PB-240802-049
Laboratory
MSDH Lab
0.148 mg/l , sample collected Jul 31, 2024 11:00, sampling point LC024 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 11:00, sampling point LC024 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:02
Sampling point
LC008 Location withheld
Sample type
Routine
Lab sample
PB-240802-045
Laboratory
MSDH Lab
0.0566 mg/l , sample collected Jul 31, 2024 10:02, sampling point LC008 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:02, sampling point LC008 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:01
Sampling point
LC009 Location withheld
Sample type
Routine
Lab sample
PB-240802-048
Laboratory
MSDH Lab
0.0067 mg/l , sample collected Jul 31, 2024 10:01, sampling point LC009 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:01, sampling point LC009 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Jul 31, 2024 10:00
Sampling point
LC003 Location withheld
Sample type
Routine
Lab sample
PB-240802-047
Laboratory
MSDH Lab
0.0752 mg/l , sample collected Jul 31, 2024 10:00, sampling point LC003 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 31, 2024 10:00, sampling point LC003 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024

Routine (10).