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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

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.

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

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 91–100 of 439 samples, newest first — collected September 6, 2022 to November 14, 2022. The summary above covers all 439.

58 results from the 10 samples listed here: 8 detected, 50 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.

Chemical and radiological sample results for Okatoma Water Association #1, every result from 91 to 100 of 439 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
Nov 14, 2022 13:30
Sampling point
TF082 Treatment Facility TF082
Sample type
Routine
Lab sample
CN-221115-007
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Nov 14, 2022 13:30, sampling point TF082 Cyanide 1024 EPA method QC10204001X Oct 1, 2022 – Dec 31, 2022
Collected
Oct 24, 2022 13:25
Sampling point
TF082 Treatment Facility TF082
Sample type
Routine
Lab sample
NI-221025-003
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 24, 2022 13:25, sampling point TF082 Nitrate-Nitrite 1038 EPA method QC10107041C Oct 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Oct 24, 2022 13:25, sampling point TF082 Nitrate 1040 EPA method QC10107041C Oct 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Oct 24, 2022 13:25, sampling point TF082 Nitrite 1041 EPA method QC10107041C Oct 1, 2022 – Dec 31, 2022
Collected
Oct 24, 2022 13:15
Sampling point
TF082 Treatment Facility TF082
Sample type
Routine
Lab sample
VO-221025-016
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Xylenes, Total 2955 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Dichloromethane 2964 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 O-Dichlorobenzene 2968 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 P-Dichlorobenzene 2969 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Vinyl Chloride 2976 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 1,1-Dichloroethylene 2977 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 1,2-Dichloroethane 2980 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 1,1,1-Trichloroethane 2981 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Carbon Tetrachloride 2982 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 1,2-Dichloropropane 2983 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Trichloroethylene 2984 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 1,1,2-Trichloroethane 2985 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Tetrachloroethylene 2987 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Chlorobenzene 2989 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Benzene 2990 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Toluene 2991 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Ethylbenzene 2992 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 24, 2022 13:15, sampling point TF082 Styrene 2996 EPA method 524.2 Oct 1, 2022 – Dec 31, 2022
Collected
Oct 17, 2022 10:42
Sampling point
TF081 Treatment Plant 081
Sample type
Routine
Lab sample
IN-221018-037
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0401 mg/l , sample collected Oct 17, 2022 10:42, sampling point TF081 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0009 mg/l , sample collected Oct 17, 2022 10:42, sampling point TF081 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:42, sampling point TF081 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Oct 17, 2022 10:45
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
IN-221018-036
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0507 mg/l , sample collected Oct 17, 2022 10:45, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0013 mg/l , sample collected Oct 17, 2022 10:45, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 17, 2022 10:45, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Sep 26, 2022 13:15
Sampling point
TF081 Treatment Plant 081
Sample type
Routine
Lab sample
CN-220927-015
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 26, 2022 13:15, sampling point TF081 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Sep 26, 2022 13:30
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
CN-220927-014
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 26, 2022 13:30, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2020 – Dec 31, 2022
Collected
Sep 6, 2022 16:16
Sampling point
TF082 Treatment Facility TF082
Sample type
Routine
Lab sample
NI-220907-025
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Sep 6, 2022 16:16, sampling point TF082 Nitrate-Nitrite 1038 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Sep 6, 2022 16:16, sampling point TF082 Nitrate 1040 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Sep 6, 2022 16:16, sampling point TF082 Nitrite 1041 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
Collected
Sep 6, 2022 15:59
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
NI-220907-024
Laboratory
MSDH Lab
5.85 mg/l , sample collected Sep 6, 2022 15:59, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
5.85 mg/l , sample collected Sep 6, 2022 15:59, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Sep 6, 2022 15:59, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
Collected
Sep 6, 2022 16:03
Sampling point
TF081 Treatment Plant 081
Sample type
Routine
Lab sample
NI-220907-026
Laboratory
MSDH Lab
3.5 mg/l , sample collected Sep 6, 2022 16:03, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
3.5 mg/l , sample collected Sep 6, 2022 16:03, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Sep 6, 2022 16:03, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jul 1, 2022 – Sep 30, 2022

Routine (10).