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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

MS0340011 , Oak Grove Water Assn

22 of the 58 analytes this system has been tested for have been detected at least once, across 302 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 302 samples on record, detections range from September 24, 2003 to November 19, 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 Oak Grove 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 61 of 61 results Jul 24, 2007 Aug 22, 2023
Lead 1030 Inorganic Chemical 42 of 61 results Jul 24, 2007 Aug 22, 2023
Barium 1010 Inorganic Chemical 24 of 24 results Sep 24, 2003 Feb 24, 2025
Fluoride 1025 Inorganic Chemical 24 of 24 results Sep 24, 2003 Feb 24, 2025
TTHM 2950 Organic Chemical 22 of 22 results Jun 16, 2004 Oct 13, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 20 of 21 results Aug 16, 2007 Nov 19, 2025
Chloroform 2941 Organic Chemical 17 of 17 results Aug 16, 2007 Oct 13, 2025
Bromodichloromethane 2943 Organic Chemical 17 of 17 results Aug 16, 2007 Oct 13, 2025
Dichloroacetic Acid 2451 Organic Chemical 15 of 15 results Sep 21, 2009 Nov 19, 2025
Trichloroacetic Acid 2452 Organic Chemical 15 of 15 results Sep 21, 2009 Nov 19, 2025
Dibromochloromethane 2944 Organic Chemical 12 of 17 results Sep 21, 2009 Oct 13, 2025
Sodium 1052 Inorganic Chemical 9 of 9 results Sep 18, 2019 Feb 3, 2025
Nickel 1036 Inorganic Chemical 8 of 24 results Feb 13, 2006 Feb 24, 2025
Chromium 1020 Inorganic Chemical 7 of 24 results Sep 24, 2003 May 30, 2017
Gross Alpha, Incl. Radon & U 4002 Radionuclide 6 of 11 results Dec 15, 2011 Dec 2, 2013
Xylenes, Total 2955 Organic Chemical 5 of 66 results Feb 2, 2004 May 31, 2005
Sulfate 1055 Inorganic Chemical 4 of 4 results Sep 24, 2003 Feb 25, 2004
Ethylbenzene 2992 Organic Chemical 2 of 66 results Feb 2, 2004 Feb 2, 2004
Monobromoacetic Acid 2453 Organic Chemical 1 of 15 results Sep 8, 2020 Sep 8, 2020
Monochloroacetic Acid 2450 Organic Chemical 1 of 15 results Jul 1, 2015 Jul 1, 2015
Arsenic 1005 Inorganic Chemical 1 of 24 results Apr 2, 2014 Apr 2, 2014
Dichloromethane 2964 Organic Chemical 1 of 66 results Aug 4, 2004 Aug 4, 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 111–120 of 302 samples, newest first — collected June 20, 2017 to February 20, 2018. The summary above covers all 302.

59 results from the 10 samples listed here: 10 detected, 49 not detected. Across the whole record it is 314 of 2,230. 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 Oak Grove Water Assn, every result from 111 to 120 of 302 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
Feb 20, 2018 10:08
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
180221-101NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 20, 2018 10:08, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 20, 2018 10:08, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 20, 2018 10:08, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Collected
Aug 22, 2017 15:18
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
170823-003VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:18, sampling point TF103 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Collected
Aug 22, 2017 15:37
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
170823-002VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 22, 2017 15:37, sampling point TF102 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Collected
Jun 20, 2017 06:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-045PB
Laboratory
MSDH Lab
0.1307 mg/l , sample collected Jun 20, 2017 06:15, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0009 mg/l , sample collected Jun 20, 2017 06:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jun 20, 2017 03:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-040PB
Laboratory
MSDH Lab
0.1054 mg/l , sample collected Jun 20, 2017 03:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0007 mg/l , sample collected Jun 20, 2017 03:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jun 20, 2017 04:14
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-039PB
Laboratory
MSDH Lab
0.0321 mg/l , sample collected Jun 20, 2017 04:14, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 20, 2017 04:14, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jun 20, 2017 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-038PB
Laboratory
MSDH Lab
0.1694 mg/l , sample collected Jun 20, 2017 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 20, 2017 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jun 20, 2017 06:25
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-037PB
Laboratory
MSDH Lab
0.0417 mg/l , sample collected Jun 20, 2017 06:25, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 20, 2017 06:25, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jun 20, 2017 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-036PB
Laboratory
MSDH Lab
0.1251 mg/l , sample collected Jun 20, 2017 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
0.0005 mg/l , sample collected Jun 20, 2017 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Collected
Jun 20, 2017 05:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
170621-034PB
Laboratory
MSDH Lab
0.1241 mg/l , sample collected Jun 20, 2017 05:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 20, 2017 05:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Dec 31, 2017

Routine (10).