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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

MS0100009 , Town of Weir

20 of the 57 analytes this system has been tested for have been detected at least once, across 246 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 246 samples on record, detections range from October 12, 1993 to February 11, 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.

Every analyte ever detected for Town of Weir, 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 142 of 151 results Oct 12, 1993 Sep 9, 2025
Lead 1030 Inorganic Chemical 107 of 151 results Oct 12, 1993 Sep 9, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 23 of 23 results May 3, 2004 Feb 11, 2026
Nitrate 1040 Inorganic Chemical 23 of 23 results May 3, 2004 Feb 11, 2026
TTHM 2950 Organic Chemical 15 of 20 results Jun 5, 2007 Feb 11, 2026
Bromoform 2942 Organic Chemical 13 of 15 results Jun 5, 2007 Feb 11, 2026
Dibromochloromethane 2944 Organic Chemical 12 of 15 results Jun 5, 2007 Feb 11, 2026
Barium 1010 Inorganic Chemical 11 of 11 results Mar 19, 2002 Jan 15, 2025
Nickel 1036 Inorganic Chemical 9 of 11 results Jan 12, 2004 Jan 15, 2025
Bromodichloromethane 2943 Organic Chemical 6 of 15 results Feb 29, 2024 Feb 11, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 21 results Jun 5, 2007 Feb 18, 2025
Chromium 1020 Inorganic Chemical 5 of 11 results Jan 12, 2004 Jan 15, 2025
Selenium 1045 Inorganic Chemical 4 of 11 results Jan 12, 2004 Mar 24, 2008
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 23, 2019 Oct 14, 2024
Chloroform 2941 Organic Chemical 3 of 15 results Feb 29, 2024 Aug 27, 2024
Nitrite 1041 Inorganic Chemical 2 of 23 results Jan 24, 2011 Jan 23, 2013
Monochloroacetic Acid 2450 Organic Chemical 1 of 15 results Apr 16, 2019 Apr 16, 2019
Dichloroacetic Acid 2451 Organic Chemical 1 of 15 results Sep 14, 2017 Sep 14, 2017
Fluoride 1025 Inorganic Chemical 1 of 11 results Apr 21, 2014 Apr 21, 2014
Cadmium 1015 Inorganic Chemical 1 of 11 results Feb 16, 2005 Feb 16, 2005

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 111–120 of 246 samples, newest first — collected July 6, 2011 to April 17, 2012. The summary above covers all 246.

23 results from the 10 samples listed here: 9 detected, 14 not detected. Across the whole record it is 388 of 855. 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 Weir, every result from 111 to 120 of 246 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
Apr 17, 2012 13:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120418-005RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 17, 2012 13:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Feb 15, 2012 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120216-068
Laboratory
Radiation Safety Engineering
Not detected below 0.32 pci/l Minimum Reporting Level , sample collected Feb 15, 2012 14:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Feb 15, 2012 14:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.188 pci/l Minimum Reporting Level , sample collected Feb 15, 2012 14:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Feb 15, 2012 14:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 15, 2012 14:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120216-068RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 15, 2012 14:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Jan 25, 2012 02:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
120126-038NI
Laboratory
MSDH Lab
0.49 mg/l , sample collected Jan 25, 2012 02:00, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
0.49 mg/l , sample collected Jan 25, 2012 02:00, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 25, 2012 02:00, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Dec 6, 2011 01:00
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
111207-009
Laboratory
Radiation Safety Engineering
Not detected below 0.32 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 01:00, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 01:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.188 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 01:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.31 pci/l Minimum Reporting Level , sample collected Dec 6, 2011 01:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011
Collected
Jul 6, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-118PB
Laboratory
MSDH Lab
0.118 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 6, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 6, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-117PB
Laboratory
MSDH Lab
0.0869 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0016 mg/l , sample collected Jul 6, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 6, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-116PB
Laboratory
MSDH Lab
0.0439 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 6, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 6, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-115PB
Laboratory
MSDH Lab
0.2848 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0011 mg/l , sample collected Jul 6, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 6, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-114PB
Laboratory
MSDH Lab
0.0473 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 6, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011

Routine (10).