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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

MS0350025 , North West Kemper W/A #4

20 of the 56 analytes this system has been tested for have been detected at least once, across 200 samples on record.

The other 36 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 200 samples on record, detections range from December 4, 2006 to December 2, 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 North West Kemper W/A #4, 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 117 of 120 results Oct 18, 2007 Aug 23, 2023
Barium 1010 Inorganic Chemical 7 of 7 results Dec 4, 2006 Jan 10, 2024
Nickel 1036 Inorganic Chemical 7 of 7 results Dec 4, 2006 Jan 10, 2024
TTHM 2950 Organic Chemical 6 of 19 results Jun 30, 2008 Dec 2, 2025
Lead 1030 Inorganic Chemical 6 of 120 results Oct 18, 2007 Aug 22, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 6 of 20 results Jun 14, 2007 May 2, 2022
Chloroform 2941 Organic Chemical 5 of 14 results Sep 6, 2012 Dec 2, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 14, 2011 Jul 18, 2012
Bromodichloromethane 2943 Organic Chemical 3 of 14 results May 23, 2024 Dec 2, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 18, 2019 Feb 5, 2025
Dibromochloromethane 2944 Organic Chemical 2 of 14 results Nov 21, 2024 Dec 2, 2025
Monobromoacetic Acid 2453 Organic Chemical 2 of 15 results Jun 5, 2019 Sep 15, 2020
Chromium 1020 Inorganic Chemical 2 of 7 results Apr 2, 2014 May 24, 2017
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 21 results Mar 27, 2024 Mar 27, 2024
Nitrate 1040 Inorganic Chemical 1 of 21 results Mar 27, 2024 Mar 27, 2024
Dibromoacetic Acid 2454 Organic Chemical 1 of 15 results Jun 5, 2019 Jun 5, 2019
Monochloroacetic Acid 2450 Organic Chemical 1 of 15 results Jul 1, 2015 Jul 1, 2015
Dichloroacetic Acid 2451 Organic Chemical 1 of 15 results Sep 6, 2012 Sep 6, 2012
Mercury 1035 Inorganic Chemical 1 of 7 results Dec 4, 2006 Dec 4, 2006
Selenium 1045 Inorganic Chemical 1 of 7 results Dec 4, 2006 Dec 4, 2006

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 200 samples, newest first — collected June 14, 2023 to August 22, 2023. The summary above covers all 200.

18 results from the 10 samples listed here: 9 detected, 9 not detected. Across the whole record it is 178 of 648. 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 8 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 North West Kemper W/A #4, every result from 21 to 30 of 200 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
Aug 22, 2023 07:10
Sampling point
LC0016 Location withheld
Sample type
Routine
Lab sample
PB-230824-092
Laboratory
MSDH Lab
0.152 mg/l , sample collected Aug 22, 2023 07:10, sampling point LC0016 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2023 07:10, sampling point LC0016 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 22, 2023 04:49
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-230824-093
Laboratory
MSDH Lab
0.0122 mg/l , sample collected Aug 22, 2023 04:49, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2023 04:49, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 22, 2023 04:30
Sampling point
LC0015 Location withheld
Sample type
Routine
Lab sample
PB-230824-094
Laboratory
MSDH Lab
0.00756 mg/l , sample collected Aug 22, 2023 04:30, sampling point LC0015 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2023 04:30, sampling point LC0015 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 22, 2023 07:30
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-230824-095
Laboratory
MSDH Lab
0.0133 mg/l , sample collected Aug 22, 2023 07:30, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2023 07:30, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 22, 2023 05:36
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-230824-098
Laboratory
MSDH Lab
0.00571 mg/l , sample collected Aug 22, 2023 05:36, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
4.95 ug/l , sample collected Aug 22, 2023 05:36, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 22, 2023 17:40
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-230824-099
Laboratory
MSDH Lab
0.0191 mg/l , sample collected Aug 22, 2023 17:40, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2023 17:40, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 21, 2023 14:30
Sampling point
LC0018 Location withheld
Sample type
Routine
Lab sample
PB-230824-090
Laboratory
MSDH Lab
0.0105 mg/l , sample collected Aug 21, 2023 14:30, sampling point LC0018 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 21, 2023 14:30, sampling point LC0018 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 21, 2023 15:00
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-230824-091
Laboratory
MSDH Lab
0.00646 mg/l , sample collected Aug 21, 2023 15:00, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 21, 2023 15:00, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Jun 14, 2023 15:29
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230615-002
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 14, 2023 15:29, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Jun 14, 2023 15:29
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230615-002
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 14, 2023 15:29, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded

Routine (10).