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 51–60 of 302 samples, newest first — collected February 8, 2022 to March 21, 2022. The summary above covers all 302.

36 results from the 10 samples listed here: 5 detected, 31 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 51 to 60 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 Mar 21, 2022 16:18 Sampling point MRT000 Max. Res. Time Sample type Routine Lab sample HA-220322-017 Laboratory MSDH Lab
10.2 ug/l , sample collected Mar 21, 2022 16:18, sampling point MRT000	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Not recorded
Collected Mar 21, 2022 16:12 Sampling point MRT000 Max. Res. Time Sample type Routine Lab sample TH-220322-017 Laboratory MSDH Lab
13 ug/l , sample collected Mar 21, 2022 16:12, sampling point MRT000	TTHM 2950 EPA method 524.2	Not recorded
Collected Feb 23, 2022 15:25 Sampling point TF103 Treatment Facility TF103 Sample type Routine Lab sample RU-220224-005 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 23, 2022 15:25, sampling point TF103	Combined Uranium 4006 EPA method 200.8	Jan 1, 2014 – Dec 31, 2022
Collected Feb 8, 2022 12:11 Sampling point TF103 Treatment Facility TF103 Sample type Routine Lab sample VO-220209-009 Laboratory MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	1,2,4-Trichlorobenzene 2378 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Cis-1,2-Dichloroethylene 2380 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Xylenes, Total 2955 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Dichloromethane 2964 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	O-Dichlorobenzene 2968 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	P-Dichlorobenzene 2969 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Vinyl Chloride 2976 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	1,1-Dichloroethylene 2977 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Trans-1,2-Dichloroethylene 2979 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	1,2-Dichloroethane 2980 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	1,1,1-Trichloroethane 2981 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Carbon Tetrachloride 2982 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	1,2-Dichloropropane 2983 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Trichloroethylene 2984 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	1,1,2-Trichloroethane 2985 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Tetrachloroethylene 2987 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Chlorobenzene 2989 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Benzene 2990 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Toluene 2991 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Ethylbenzene 2992 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 8, 2022 12:11, sampling point TF103	Styrene 2996 EPA method 524.2	Jan 1, 2022 – Dec 31, 2027
Collected Feb 8, 2022 12:09 Sampling point TF103 Treatment Facility TF103 Sample type Routine Lab sample NA-220209-012 Laboratory MSDH Lab
53.8 mg/l , sample collected Feb 8, 2022 12:09, sampling point TF103	Sodium 1052 EPA method 200.7	Not recorded
Collected Feb 8, 2022 11:49 Sampling point TF102 Treatment Plant T102 Sample type Routine Lab sample NA-220209-011 Laboratory MSDH Lab
56.5 mg/l , sample collected Feb 8, 2022 11:49, sampling point TF102	Sodium 1052 EPA method 200.7	Not recorded
Collected Feb 8, 2022 12:15 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample NA-220209-013 Laboratory MSDH Lab
54.3 mg/l , sample collected Feb 8, 2022 12:15, sampling point TF101	Sodium 1052 EPA method 200.7	Not recorded
Collected Feb 8, 2022 12:23 Sampling point TF103 Treatment Facility TF103 Sample type Routine Lab sample NI-220209-027 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 12:23, sampling point TF103	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 12:23, sampling point TF103	Nitrate 1040 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 12:23, sampling point TF103	Nitrite 1041 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Collected Feb 8, 2022 11:49 Sampling point TF102 Treatment Plant T102 Sample type Routine Lab sample NI-220209-026 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 11:49, 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 Feb 8, 2022 11:49, 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 Feb 8, 2022 11:49, sampling point TF102	Nitrite 1041 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Collected Feb 8, 2022 12:25 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample NI-220209-028 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 12:25, sampling point TF101	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 12:25, sampling point TF101	Nitrate 1040 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 8, 2022 12:25, sampling point TF101	Nitrite 1041 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022

Collected
Mar 21, 2022 16:18

Sampling point
MRT000 Max. Res. Time

Sample type
Routine

Lab sample
HA-220322-017

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  10.2 ug/l
Collected
Mar 21, 2022 16:12

Sampling point
MRT000 Max. Res. Time

Sample type
Routine

Lab sample
TH-220322-017

Laboratory
MSDH Lab

Monitoring period
Not recorded
- TTHM 2950 EPA method 524.2
  
  Result
  13 ug/l
Collected
Feb 23, 2022 15:25

Sampling point
TF103 Treatment Facility TF103

Sample type
Routine

Lab sample
RU-220224-005

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2014 – Dec 31, 2022
- Combined Uranium 4006 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Feb 8, 2022 12:11

Sampling point
TF103 Treatment Facility TF103

Sample type
Routine

Lab sample
VO-220209-009

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2027
- 1,2,4-Trichlorobenzene 2378 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Cis-1,2-Dichloroethylene 2380 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Xylenes, Total 2955 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Dichloromethane 2964 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- O-Dichlorobenzene 2968 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- P-Dichlorobenzene 2969 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Vinyl Chloride 2976 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,1-Dichloroethylene 2977 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Trans-1,2-Dichloroethylene 2979 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,2-Dichloroethane 2980 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,1,1-Trichloroethane 2981 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Carbon Tetrachloride 2982 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,2-Dichloropropane 2983 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Trichloroethylene 2984 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- 1,1,2-Trichloroethane 2985 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Tetrachloroethylene 2987 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Chlorobenzene 2989 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Benzene 2990 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Toluene 2991 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Ethylbenzene 2992 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
- Styrene 2996 EPA method 524.2
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
Collected
Feb 8, 2022 12:09

Sampling point
TF103 Treatment Facility TF103

Sample type
Routine

Lab sample
NA-220209-012

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Sodium 1052 EPA method 200.7
  
  Result
  53.8 mg/l
Collected
Feb 8, 2022 11:49

Sampling point
TF102 Treatment Plant T102

Sample type
Routine

Lab sample
NA-220209-011

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Sodium 1052 EPA method 200.7
  
  Result
  56.5 mg/l
Collected
Feb 8, 2022 12:15

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
NA-220209-013

Laboratory
MSDH Lab

Monitoring period
Not recorded
- Sodium 1052 EPA method 200.7
  
  Result
  54.3 mg/l
Collected
Feb 8, 2022 12:23

Sampling point
TF103 Treatment Facility TF103

Sample type
Routine

Lab sample
NI-220209-027

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2022
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Feb 8, 2022 11:49

Sampling point
TF102 Treatment Plant T102

Sample type
Routine

Lab sample
NI-220209-026

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2022
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Feb 8, 2022 12:25

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
NI-220209-028

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2022
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level

Routine (10).