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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 341–350 of 399 samples, newest first — collected April 26, 2005 to September 19, 2005. The summary above covers all 399.

90 results from the 10 samples listed here: 24 detected, 66 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.

Chemical and radiological sample results for Keownville Rural Water Assn, every result from 341 to 350 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
Sep 19, 2005
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
050920-071VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Benzene 2990 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Toluene 2991 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Sep 19, 2005, sampling point TF103 Styrene 2996 EPA method 524.2 Jul 1, 2005 – Sep 30, 2005
Collected
Jun 14, 2005
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
050615-005VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Benzene 2990 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Toluene 2991 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jun 14, 2005, sampling point TF103 Styrene 2996 EPA method 524.2 Apr 1, 2005 – Jun 30, 2005
Collected
Apr 26, 2005
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
050427-013CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
050427-012CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
050427-011CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF104 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
050427-014CN
Laboratory
MSDH Lab
Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF104 Treatment Plant T104
Sample type
Routine
Lab sample
050427-007IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.042428 mg/l , sample collected Apr 26, 2005, sampling point TF104 Barium 1010 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000242 mg/l , sample collected Apr 26, 2005, sampling point TF104 Cadmium 1015 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.00536 mg/l , sample collected Apr 26, 2005, sampling point TF104 Chromium 1020 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.203522 mg/l , sample collected Apr 26, 2005, sampling point TF104 Fluoride 1025 EPA method 380-75WE Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF104 Mercury 1035 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000539 mg/l , sample collected Apr 26, 2005, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
0.001253 mg/l , sample collected Apr 26, 2005, sampling point TF104 Selenium 1045 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
050427-010IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.062675 mg/l , sample collected Apr 26, 2005, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000237 mg/l , sample collected Apr 26, 2005, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.00385 mg/l , sample collected Apr 26, 2005, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.16856 mg/l , sample collected Apr 26, 2005, sampling point TF102 Fluoride 1025 EPA method 380-75WE Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000659 mg/l , sample collected Apr 26, 2005, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
0.001192 mg/l , sample collected Apr 26, 2005, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
050427-009IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.042956 mg/l , sample collected Apr 26, 2005, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000203 mg/l , sample collected Apr 26, 2005, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.003885 mg/l , sample collected Apr 26, 2005, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.201258 mg/l , sample collected Apr 26, 2005, sampling point TF103 Fluoride 1025 EPA method 380-75WE Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000574 mg/l , sample collected Apr 26, 2005, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
0.00122 mg/l , sample collected Apr 26, 2005, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Collected
Apr 26, 2005
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
050427-008IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.063943 mg/l , sample collected Apr 26, 2005, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000238 mg/l , sample collected Apr 26, 2005, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.004057 mg/l , sample collected Apr 26, 2005, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.175959 mg/l , sample collected Apr 26, 2005, sampling point TF101 Fluoride 1025 EPA method 380-75WE Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
0.000753 mg/l , sample collected Apr 26, 2005, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
0.001278 mg/l , sample collected Apr 26, 2005, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 26, 2005, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2005 – Dec 31, 2007

Routine (10).