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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

MS0350003 , NW Kemper W/A #1-Preston

18 of the 57 analytes this system has been tested for have been detected at least once, across 164 samples on record.

The other 39 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 164 samples on record, detections range from September 24, 2003 to July 30, 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 NW Kemper W/A #1-Preston, 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 70 of 70 results Aug 2, 2007 Jul 30, 2026
Lead 1030 Inorganic Chemical 23 of 70 results Aug 2, 2007 Jul 30, 2026
Nitrate-Nitrite 1038 Inorganic Chemical 21 of 22 results May 17, 2004 Mar 5, 2025
Nitrate 1040 Inorganic Chemical 21 of 22 results May 17, 2004 Mar 5, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Sep 24, 2003 Feb 26, 2025
TTHM 2950 Organic Chemical 7 of 21 results Aug 16, 2007 Dec 2, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 7 of 20 results Aug 16, 2007 Jun 14, 2023
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 14, 2011 Jul 18, 2012
Chloroform 2941 Organic Chemical 4 of 16 results Aug 16, 2007 Dec 2, 2025
Bromodichloromethane 2943 Organic Chemical 4 of 16 results Aug 16, 2007 Dec 2, 2025
Dibromochloromethane 2944 Organic Chemical 4 of 16 results Aug 16, 2007 Dec 2, 2025
Bromoform 2942 Organic Chemical 3 of 16 results Aug 21, 2018 Dec 2, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 18, 2019 Feb 5, 2025
Nickel 1036 Inorganic Chemical 2 of 10 results Aug 31, 2022 Feb 26, 2025
Monobromoacetic Acid 2453 Organic Chemical 2 of 14 results Aug 7, 2019 Sep 15, 2020
Chromium 1020 Inorganic Chemical 1 of 10 results Feb 26, 2025 Feb 26, 2025
Monochloroacetic Acid 2450 Organic Chemical 1 of 14 results Aug 21, 2018 Aug 21, 2018
Dichloroacetic Acid 2451 Organic Chemical 1 of 14 results Aug 21, 2018 Aug 21, 2018

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 131–140 of 164 samples, newest first — collected August 2, 2007 to April 29, 2009. The summary above covers all 164.

52 results from the 10 samples listed here: 15 detected, 37 not detected. Across the whole record it is 189 of 678. 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 NW Kemper W/A #1-Preston, every result from 131 to 140 of 164 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 29, 2009
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
090430-034NI
Laboratory
MSDH Lab
0.89 mg/l , sample collected Apr 29, 2009, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
0.89 mg/l , sample collected Apr 29, 2009, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Apr 29, 2009, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Mar 24, 2009
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
090325-003VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Mar 24, 2009, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2005 – Dec 31, 2010
Collected
Feb 2, 2009
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
090203-010IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.009555 mg/l , sample collected Feb 2, 2009, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 2, 2009, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Jun 11, 2008
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
080612-005NI
Laboratory
MSDH Lab
0.84 mg/l , sample collected Jun 11, 2008, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
0.84 mg/l , sample collected Jun 11, 2008, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 11, 2008, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Collected
Aug 16, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070817-016HA
Laboratory
MSDH Lab
0.0013 mg/l 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 Aug 16, 2007, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2005 – Dec 31, 2007
Collected
Aug 16, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070817-016TH
Laboratory
MSDH Lab
6.96 ug/l , sample collected Aug 16, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 16, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
3.23 ug/l , sample collected Aug 16, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
2.07 ug/l , sample collected Aug 16, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
12.26 ug/l , sample collected Aug 16, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
Aug 2, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070803-431PB
Laboratory
MSDH Lab
0.0129 mg/l , sample collected Aug 2, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0033 mg/l , sample collected Aug 2, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 2, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070803-432PB
Laboratory
MSDH Lab
0.0012 mg/l , sample collected Aug 2, 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 2, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 2, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070803-433PB
Laboratory
MSDH Lab
0.0026 mg/l , sample collected Aug 2, 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 2, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 2, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070803-430PB
Laboratory
MSDH Lab
0.0037 mg/l , sample collected Aug 2, 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 2, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008

Routine (10).