Chemical and radiological sample results

MS0640009 , Okatoma Water Association #1

27 of the 98 analytes this system has been tested for have been detected at least once, across 439 samples on record.

The other 71 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 439 samples on record, detections range from October 22, 2003 to July 22, 2026. These figures cover the whole record; the list of samples further down is narrowed.

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 Okatoma Water Association #1, 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
Nitrate-Nitrite 1038	Inorganic Chemical	124 of 138 results	Jun 14, 2004	Jul 22, 2026
Nitrate 1040	Inorganic Chemical	124 of 138 results	Jun 14, 2004	Jul 22, 2026
Copper, Free 1022	Inorganic Chemical	107 of 107 results	Sep 6, 2007	Jul 8, 2025
Lead 1030	Inorganic Chemical	40 of 107 results	Sep 6, 2007	Jul 8, 2025
Barium 1010	Inorganic Chemical	25 of 25 results	Oct 22, 2003	Apr 7, 2025
TTHM 2950	Organic Chemical	18 of 20 results	Aug 16, 2004	Jun 4, 2025
Nickel 1036	Inorganic Chemical	17 of 25 results	Mar 22, 2004	Apr 7, 2025
Combined Radium (-226 & -228) 4010	Radionuclide	14 of 14 results	Mar 14, 2012	Oct 8, 2019
Radium-226 4020	Radionuclide	14 of 14 results	Mar 14, 2012	Oct 8, 2019
Radium-228 4030	Radionuclide	14 of 14 results	Mar 14, 2012	Oct 8, 2019
Bromodichloromethane 2943	Organic Chemical	13 of 14 results	Sep 10, 2007	Jun 4, 2025
Dibromochloromethane 2944	Organic Chemical	12 of 14 results	Sep 10, 2007	Jun 4, 2025
Gross Alpha, Incl. Radon & U 4002	Radionuclide	11 of 14 results	Mar 14, 2012	Oct 15, 2018
Fluoride 1025	Inorganic Chemical	9 of 25 results	Apr 10, 2006	Apr 7, 2025
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	8 of 20 results	Jul 6, 2010	Apr 7, 2025
Chloroform 2941	Organic Chemical	7 of 14 results	Sep 10, 2007	Jun 4, 2025
Bromoform 2942	Organic Chemical	6 of 14 results	Jul 6, 2010	Jun 4, 2025
Sodium 1052	Inorganic Chemical	5 of 5 results	Sep 17, 2019	Jul 22, 2026
Dibromoacetic Acid 2454	Organic Chemical	3 of 13 results	Sep 4, 2013	Jun 4, 2025
Chromium 1020	Inorganic Chemical	3 of 25 results	Oct 22, 2003	Apr 7, 2025
Arsenic 1005	Inorganic Chemical	2 of 25 results	Feb 8, 2010	Feb 12, 2024
Xylenes, Total 2955	Organic Chemical	1 of 29 results	Nov 29, 2022	Nov 29, 2022
Monobromoacetic Acid 2453	Organic Chemical	1 of 13 results	Oct 12, 2020	Oct 12, 2020
Monochloroacetic Acid 2450	Organic Chemical	1 of 13 results	Dec 6, 2016	Dec 6, 2016
Selenium 1045	Inorganic Chemical	1 of 25 results	Feb 8, 2010	Feb 8, 2010
Cadmium 1015	Inorganic Chemical	1 of 25 results	Nov 3, 2008	Nov 3, 2008
Cyanide 1024	Inorganic Chemical	1 of 27 results	Apr 10, 2006	Apr 10, 2006

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The table below lists 1–10 of 40 samples, newest first — collected July 8, 2025 to July 22, 2026. The summary above covers all 40.

41 results from the 10 samples listed here: 11 detected, 30 not detected. Across the whole record it is 582 of 1,978. 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 1 sampling point 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 Okatoma Water Association #1, every result from 1 to 10 of 40 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 Jul 22, 2026 Sampling point TF082 Treatment Facility TF082 Sample type Routine Lab sample 35052962003 Laboratory Pace Analytical Services, LLC
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF082	Nitrate-Nitrite 1038	Apr 1, 2026 – Jun 30, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF082	Nitrate 1040 EPA method 353.2	Apr 1, 2026 – Jun 30, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF082	Nitrite 1041 EPA method 353.2	Apr 1, 2026 – Jun 30, 2026
42300 ug/l , sample collected Jul 22, 2026, sampling point TF082	Sodium 1052 EPA method 200.7	Apr 1, 2026 – Jun 30, 2026
Collected Jul 22, 2026 Sampling point TF081 Treatment Plant 081 Sample type Routine Lab sample 35052962002 Laboratory Pace Analytical Services, LLC
3.8 mg/l , sample collected Jul 22, 2026, sampling point TF081	Nitrate-Nitrite 1038	Apr 1, 2026 – Jun 30, 2026
3.8 mg/l , sample collected Jul 22, 2026, sampling point TF081	Nitrate 1040 EPA method 353.2	Apr 1, 2026 – Jun 30, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 22, 2026, sampling point TF081	Nitrite 1041 EPA method 353.2	Apr 1, 2026 – Jun 30, 2026
13600 ug/l , sample collected Jul 22, 2026, sampling point TF081	Sodium 1052 EPA method 200.7	Apr 1, 2026 – Jun 30, 2026
Collected Jul 22, 2026 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample 35052962001 Laboratory Pace Analytical Services, LLC
19300 ug/l , sample collected Jul 22, 2026, sampling point TF080	Sodium 1052 EPA method 200.7	Apr 1, 2026 – Jun 30, 2026
Collected Jun 30, 2026 Sampling point TF081 Treatment Plant 081 Sample type Routine Lab sample 35047532001 Laboratory Pace Analytical Services, LLC
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	1,2,4-Trichlorobenzene 2378 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Cis-1,2-Dichloroethylene 2380 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Xylenes, Total 2955 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Dichloromethane 2964 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	O-Dichlorobenzene 2968 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	P-Dichlorobenzene 2969 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Vinyl Chloride 2976 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	1,1-Dichloroethylene 2977 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Trans-1,2-Dichloroethylene 2979 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	1,2-Dichloroethane 2980 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	1,1,1-Trichloroethane 2981 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Carbon Tetrachloride 2982 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	1,2-Dichloropropane 2983 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Trichloroethylene 2984 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	1,1,2-Trichloroethane 2985 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Tetrachloroethylene 2987 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Chlorobenzene 2989 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Benzene 2990 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Toluene 2991 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Ethylbenzene 2992 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF081	Styrene 2996 EPA method 524.2	Jan 1, 2021 – Dec 31, 2026
Collected Nov 4, 2025 14:20 Sampling point TF081 Treatment Plant 081 Sample type Routine Lab sample CN-251105-009 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Nov 4, 2025 14:20, sampling point TF081	Cyanide 1024 EPA method QC10204001X	Jan 1, 2023 – Dec 31, 2025
Collected Nov 4, 2025 14:10 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample CN-251105-008 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Nov 4, 2025 14:10, sampling point TF080	Cyanide 1024 EPA method QC10204001X	Jan 1, 2023 – Dec 31, 2025
Collected Oct 7, 2025 10:48 Sampling point TF081 Treatment Plant 081 Sample type Routine Lab sample NI-251008-009 Laboratory MSDH Lab
3.59 mg/l , sample collected Oct 7, 2025 10:48, sampling point TF081	Nitrate-Nitrite 1038 EPA method QC10107041C	Oct 1, 2025 – Dec 31, 2025
3.59 mg/l , sample collected Oct 7, 2025 10:48, sampling point TF081	Nitrate 1040 EPA method QC10107041C	Oct 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 7, 2025 10:48, sampling point TF081	Nitrite 1041 EPA method QC10107041C	Oct 1, 2025 – Dec 31, 2025
Collected Oct 7, 2025 10:46 Sampling point TF080 Treatment Plant T080 Sample type Routine Lab sample NI-251008-010 Laboratory MSDH Lab
6.72 mg/l , sample collected Oct 7, 2025 10:46, sampling point TF080	Nitrate-Nitrite 1038 EPA method QC10107041C	Oct 1, 2025 – Dec 31, 2025
6.72 mg/l , sample collected Oct 7, 2025 10:46, sampling point TF080	Nitrate 1040 EPA method QC10107041C	Oct 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 7, 2025 10:46, sampling point TF080	Nitrite 1041 EPA method QC10107041C	Oct 1, 2025 – Dec 31, 2025
Collected Sep 16, 2025 13:20 Sampling point TF082 Treatment Facility TF082 Sample type Routine Lab sample IN-250917-024 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 16, 2025 13:20, sampling point TF082	Mercury 1035 EPA method 200.8	Jan 1, 2025 – Dec 31, 2025
Collected Jul 8, 2025 10:46 Sampling point LC001 Location withheld Sample type Routine Lab sample PB-250710-011 Laboratory MSDH Lab
0.0862 mg/l , sample collected Jul 8, 2025 10:46, sampling point LC001	Copper, Free 1022 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
3 ug/l , sample collected Jul 8, 2025 10:46, sampling point LC001	Lead 1030 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025

Collected
Jul 22, 2026

Sampling point
TF082 Treatment Facility TF082

Sample type
Routine

Lab sample
35052962003

Laboratory
Pace Analytical Services, LLC

Monitoring period
Apr 1, 2026 – Jun 30, 2026
- Nitrate-Nitrite 1038
  
  Result
  Not detected below 0.05 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method 353.2
  
  Result
  Not detected below 0.05 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method 353.2
  
  Result
  Not detected below 0.05 mg/l Minimum Reporting Level
- Sodium 1052 EPA method 200.7
  
  Result
  42300 ug/l
Collected
Jul 22, 2026

Sampling point
TF081 Treatment Plant 081

Sample type
Routine

Lab sample
35052962002

Laboratory
Pace Analytical Services, LLC

Monitoring period
Apr 1, 2026 – Jun 30, 2026
- Nitrate-Nitrite 1038
  
  Result
  3.8 mg/l
- Nitrate 1040 EPA method 353.2
  
  Result
  3.8 mg/l
- Nitrite 1041 EPA method 353.2
  
  Result
  Not detected below 0.05 mg/l Minimum Reporting Level
- Sodium 1052 EPA method 200.7
  
  Result
  13600 ug/l
Collected
Jul 22, 2026

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
35052962001

Laboratory
Pace Analytical Services, LLC

Monitoring period
Apr 1, 2026 – Jun 30, 2026
- Sodium 1052 EPA method 200.7
  
  Result
  19300 ug/l
Collected
Jun 30, 2026

Sampling point
TF081 Treatment Plant 081

Sample type
Routine

Lab sample
35047532001

Laboratory
Pace Analytical Services, LLC

Monitoring period
Jan 1, 2021 – Dec 31, 2026
- 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 1 ug/l Minimum Reporting Level
- Dichloromethane 2964 EPA method 524.2
  
  Result
  Not detected below 1 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
Nov 4, 2025 14:20

Sampling point
TF081 Treatment Plant 081

Sample type
Routine

Lab sample
CN-251105-009

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Nov 4, 2025 14:10

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
CN-251105-008

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Oct 7, 2025 10:48

Sampling point
TF081 Treatment Plant 081

Sample type
Routine

Lab sample
NI-251008-009

Laboratory
MSDH Lab

Monitoring period
Oct 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  3.59 mg/l
- Nitrate 1040 EPA method QC10107041C
  
  Result
  3.59 mg/l
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Oct 7, 2025 10:46

Sampling point
TF080 Treatment Plant T080

Sample type
Routine

Lab sample
NI-251008-010

Laboratory
MSDH Lab

Monitoring period
Oct 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  6.72 mg/l
- Nitrate 1040 EPA method QC10107041C
  
  Result
  6.72 mg/l
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Sep 16, 2025 13:20

Sampling point
TF082 Treatment Facility TF082

Sample type
Routine

Lab sample
IN-250917-024

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Mercury 1035 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Jul 8, 2025 10:46

Sampling point
LC001 Location withheld

Sample type
Routine

Lab sample
PB-250710-011

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2023 – Dec 31, 2025
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.0862 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  3 ug/l

Routine (10).