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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

MS0730004 , Keownville Rural Water Assn

24 of the 57 analytes this system has been tested for have been detected at least once, across 399 samples on record.

The other 33 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 399 samples on record, detections range from October 29, 2003 to July 15, 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 Keownville Rural Water Assn, 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 97 of 97 results Aug 11, 2004 Aug 27, 2024
Lead 1030 Inorganic Chemical 74 of 97 results Aug 11, 2004 Aug 27, 2024
Barium 1010 Inorganic Chemical 41 of 41 results Oct 29, 2003 Apr 8, 2025
Fluoride 1025 Inorganic Chemical 41 of 41 results Oct 29, 2003 Apr 8, 2025
Chromium 1020 Inorganic Chemical 29 of 41 results Oct 29, 2003 Apr 8, 2025
Nickel 1036 Inorganic Chemical 25 of 41 results Mar 29, 2004 Apr 8, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 15 of 20 results Mar 22, 2012 Oct 10, 2012
TTHM 2950 Organic Chemical 10 of 20 results Sep 18, 2007 Jul 15, 2025
Selenium 1045 Inorganic Chemical 9 of 41 results Apr 26, 2005 Mar 3, 2010
Sodium 1052 Inorganic Chemical 8 of 8 results Sep 23, 2019 Mar 29, 2023
Sulfate 1055 Inorganic Chemical 8 of 8 results Oct 29, 2003 Mar 29, 2004
Arsenic 1005 Inorganic Chemical 7 of 41 results Dec 4, 2006 Feb 6, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 5 of 20 results Jul 20, 2010 Jul 15, 2025
Bromoform 2942 Organic Chemical 5 of 14 results Jul 20, 2010 Jun 2, 2025
Nitrite 1041 Inorganic Chemical 5 of 90 results Oct 3, 2005 Nov 13, 2018
Combined Radium (-226 & -228) 4010 Radionuclide 5 of 20 results Mar 22, 2012 Oct 10, 2012
Radium-226 4020 Radionuclide 5 of 20 results Mar 22, 2012 Oct 10, 2012
Nitrate-Nitrite 1038 Inorganic Chemical 4 of 90 results Oct 3, 2005 Mar 14, 2023
Cadmium 1015 Inorganic Chemical 4 of 41 results Apr 26, 2005 Apr 26, 2005
Dibromochloromethane 2944 Organic Chemical 2 of 14 results Dec 5, 2024 Feb 10, 2025
Nitrate 1040 Inorganic Chemical 1 of 90 results Mar 14, 2023 Mar 14, 2023
Monochloroacetic Acid 2450 Organic Chemical 1 of 13 results Oct 30, 2013 Oct 30, 2013
Cyanide 1024 Inorganic Chemical 1 of 41 results May 9, 2011 May 9, 2011
Toluene 2991 Organic Chemical 1 of 51 results Jun 9, 2004 Jun 9, 2004

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 71–80 of 399 samples, newest first — collected August 2, 2021 to April 6, 2022. The summary above covers all 399.

35 results from the 10 samples listed here: 6 detected, 29 not detected. Across the whole record it is 403 of 2,306. 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 3 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 Keownville Rural Water Assn, every result from 71 to 80 of 399 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 6, 2022 11:30
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-220407-015
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 6, 2022 11:30, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 6, 2022 11:30, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 6, 2022 11:30, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Collected
Dec 1, 2021 14:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-211202-021
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 1, 2021 14:10, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Dec 1, 2021 14:10
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-211202-021
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 1, 2021 14:10, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Nov 3, 2021 14:10
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
VO-211104-006
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 3, 2021 14:10, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2021 – Dec 31, 2021
Collected
Oct 5, 2021 10:50
Sampling point
TF105
Sample type
Routine
Lab sample
RU-211006-011
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 5, 2021 10:50, sampling point TF105 Combined Uranium 4006 EPA method 200.8 Jan 1, 2013 – Dec 31, 2021
Collected
Oct 5, 2021 10:30
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
RU-211006-010
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 5, 2021 10:30, sampling point TF104 Combined Uranium 4006 EPA method 200.8 Jan 1, 2013 – Dec 31, 2021
Collected
Oct 5, 2021 10:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
RU-211006-009
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 5, 2021 10:00, sampling point TF102 Combined Uranium 4006 EPA method 200.8 Jan 1, 2013 – Dec 31, 2021
Collected
Aug 3, 2021 06:00
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-210805-039
Laboratory
MSDH Lab
0.0401 mg/l , sample collected Aug 3, 2021 06:00, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
1.4 ug/l , sample collected Aug 3, 2021 06:00, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Aug 3, 2021 12:00
Sampling point
LC0016 Location withheld
Sample type
Routine
Lab sample
PB-210805-037
Laboratory
MSDH Lab
0.0114 mg/l , sample collected Aug 3, 2021 12:00, sampling point LC0016 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.6 ug/l , sample collected Aug 3, 2021 12:00, sampling point LC0016 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Aug 2, 2021 06:05
Sampling point
LC0014 Location withheld
Sample type
Routine
Lab sample
PB-210805-040
Laboratory
MSDH Lab
0.0313 mg/l , sample collected Aug 2, 2021 06:05, sampling point LC0014 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.6 ug/l , sample collected Aug 2, 2021 06:05, sampling point LC0014 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021

Routine (10).