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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

MS0640022 , Okatoma Water Association #2

39 of the 72 analytes this system has been tested for have been detected at least once, across 643 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 643 samples on record, detections range from April 16, 2002 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 #2, 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 164 of 166 results Jun 10, 2004 Aug 20, 2025
Barium 1010 Inorganic Chemical 69 of 69 results Apr 16, 2002 Jun 25, 2026
Xylenes, Total 2955 Organic Chemical 49 of 143 results Sep 15, 2010 Jul 19, 2021
Fluoride 1025 Inorganic Chemical 47 of 70 results Apr 16, 2002 Apr 7, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 44 of 108 results Jun 14, 2004 Jul 22, 2026
Nitrate 1040 Inorganic Chemical 44 of 108 results Jun 14, 2004 Jul 22, 2026
Lead 1030 Inorganic Chemical 30 of 166 results Jun 10, 2004 Aug 20, 2025
Nickel 1036 Inorganic Chemical 21 of 68 results Nov 24, 2003 Apr 7, 2025
Chromium 1020 Inorganic Chemical 19 of 69 results Apr 16, 2002 Apr 7, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 16 of 17 results Dec 14, 2011 Jan 16, 2018
Ethylbenzene 2992 Organic Chemical 12 of 143 results Aug 29, 2011 Feb 23, 2016
Sodium 1052 Inorganic Chemical 11 of 11 results Apr 27, 2010 Jul 22, 2026
TTHM 2950 Organic Chemical 7 of 17 results Oct 1, 2007 Sep 16, 2025
Selenium 1045 Inorganic Chemical 7 of 69 results Mar 2, 2005 Feb 8, 2010
Bromodichloromethane 2943 Organic Chemical 6 of 13 results Oct 1, 2007 Sep 16, 2025
Dibromochloromethane 2944 Organic Chemical 6 of 13 results Oct 1, 2007 Nov 18, 2024
Cadmium 1015 Inorganic Chemical 5 of 69 results Mar 31, 2004 Jan 23, 2006
Chloroform 2941 Organic Chemical 4 of 13 results Oct 1, 2007 Sep 16, 2025
Sulfate 1055 Inorganic Chemical 4 of 10 results Apr 16, 2002 Apr 27, 2010
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 3 of 17 results Jul 6, 2010 Jul 8, 2024
Carbon Tetrachloride 2982 Organic Chemical 2 of 143 results Aug 26, 2020 Aug 26, 2020
Radium-226 4020 Radionuclide 2 of 23 results Dec 12, 2012 Jan 16, 2018
Gross Alpha Particle Activity 4109 Radionuclide 2 of 6 results Sep 26, 2012 Dec 12, 2012
Nitrite 1041 Inorganic Chemical 1 of 108 results Apr 19, 2021 Apr 19, 2021
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 23 results Dec 12, 2012 Dec 12, 2012
Toluene 2991 Organic Chemical 1 of 143 results Jan 18, 2012 Jan 18, 2012
Calcium 1016 Inorganic Chemical 1 of 1 result Apr 27, 2010 Apr 27, 2010
Chloride 1017 Inorganic Chemical 1 of 1 result Apr 27, 2010 Apr 27, 2010
Magnesium 1031 Inorganic Chemical 1 of 1 result Apr 27, 2010 Apr 27, 2010
Manganese 1032 Inorganic Chemical 1 of 1 result Apr 27, 2010 Apr 27, 2010
Potassium 1042 Inorganic Chemical 1 of 1 result Apr 27, 2010 Apr 27, 2010
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010
Carbon Dioxide 1901 Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010
Alkalinity, Total 1927 Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result Apr 27, 2010 Apr 27, 2010
Calculated Sodium NACA Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010
PH, Field Result PHFD Water Quality 1 of 1 result Apr 27, 2010 Apr 27, 2010

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 11–20 of 46 samples, newest first — collected August 20, 2025 to September 16, 2025. The summary above covers all 46.

18 results from the 10 samples listed here: 9 detected, 9 not detected. Across the whole record it is 590 of 4,799. 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 #2, every result from 11 to 20 of 46 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 16, 2025 11:27
Sampling point
TF108 Treatment Plant T108
Sample type
Routine
Lab sample
IN-250917-010
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 16, 2025 11:27, sampling point TF108 Mercury 1035 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Sep 16, 2025 11:25
Sampling point
TF107
Sample type
Routine
Lab sample
IN-250917-009
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 16, 2025 11:25, sampling point TF107 Mercury 1035 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Aug 20, 2025 06:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-120
Laboratory
MSDH Lab
0.0556 mg/l , sample collected Aug 20, 2025 06:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 06:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 10:53
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-119
Laboratory
MSDH Lab
0.0144 mg/l , sample collected Aug 20, 2025 10:53, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.7 ug/l , sample collected Aug 20, 2025 10:53, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-118
Laboratory
MSDH Lab
0.0054 mg/l , sample collected Aug 20, 2025 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 00:21
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-116
Laboratory
MSDH Lab
0.0238 mg/l , sample collected Aug 20, 2025 00:21, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 00:21, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 08:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-115
Laboratory
MSDH Lab
0.0559 mg/l , sample collected Aug 20, 2025 08:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 08:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 05:30
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-250821-114
Laboratory
MSDH Lab
0.0126 mg/l , sample collected Aug 20, 2025 05:30, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 05:30, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 08:15
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-113
Laboratory
MSDH Lab
0.0151 mg/l , sample collected Aug 20, 2025 08:15, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 08:15, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 20, 2025 06:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
PB-250821-112
Laboratory
MSDH Lab
0.0503 mg/l , sample collected Aug 20, 2025 06:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 20, 2025 06:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025

Routine (10).