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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 121–130 of 246 samples, newest first — collected January 24, 2011 to July 6, 2011. The summary above covers all 246.

36 results from the 10 samples listed here: 17 detected, 19 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 121 to 130 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
Jul 6, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-097PB
Laboratory
MSDH Lab
0.2633 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0048 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
110707-096PB
Laboratory
MSDH Lab
0.0205 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0015 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
110707-095PB
Laboratory
MSDH Lab
0.0182 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0014 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
110707-094PB
Laboratory
MSDH Lab
0.2641 mg/l , sample collected Jul 6, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.002 mg/l , sample collected Jul 6, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jul 5, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110707-119PB
Laboratory
MSDH Lab
0.047 mg/l , sample collected Jul 5, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0056 mg/l , sample collected Jul 5, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 29, 2011 12:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
110630-001CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Jun 29, 2011 12:30, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jun 14, 2011 01:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110615-015TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 14, 2011 01:30, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
1.14 ug/l , sample collected Jun 14, 2011 01:30, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 14, 2011 01:30, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
2.47 ug/l , sample collected Jun 14, 2011 01:30, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
3.61 ug/l , sample collected Jun 14, 2011 01:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2009 – Dec 31, 2011
Collected
Jun 14, 2011
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110615-015HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 14, 2011, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 14, 2011, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 14, 2011, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 14, 2011, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 14, 2011, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Jun 14, 2011, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2009 – Dec 31, 2011
Collected
May 2, 2011
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
110503-012IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.044266 mg/l , sample collected May 2, 2011, 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 2, 2011, 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 2, 2011, 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 2, 2011, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 2, 2011, 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 2, 2011, 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 2, 2011, 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 2, 2011, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Jan 24, 2011
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
110125-089NI
Laboratory
MSDH Lab
0.55 mg/l , sample collected Jan 24, 2011, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
0.53 mg/l , sample collected Jan 24, 2011, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
0.02 mg/l , sample collected Jan 24, 2011, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011

Routine (10).