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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

MS0530014 , Oktoc Water Association #1

29 of the 58 analytes this system has been tested for have been detected at least once, across 244 samples on record.

The other 29 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 244 samples on record, detections range from October 13, 2003 to August 3, 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 Oktoc 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
Copper, Free 1022 Inorganic Chemical 60 of 60 results Aug 14, 2007 Oct 13, 2023
Lead 1030 Inorganic Chemical 25 of 60 results Aug 14, 2007 Oct 11, 2023
Barium 1010 Inorganic Chemical 22 of 22 results Oct 13, 2003 Dec 4, 2024
Fluoride 1025 Inorganic Chemical 21 of 22 results Oct 13, 2003 Dec 4, 2024
Chromium 1020 Inorganic Chemical 16 of 22 results Oct 13, 2003 Dec 4, 2024
TTHM 2950 Organic Chemical 13 of 17 results Aug 29, 2007 Mar 6, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 12 of 18 results Aug 29, 2007 Mar 6, 2025
Dichloroacetic Acid 2451 Organic Chemical 7 of 13 results Aug 21, 2013 Mar 6, 2025
Dibromochloromethane 2944 Organic Chemical 7 of 13 results Aug 21, 2013 Nov 6, 2024
Bromoform 2942 Organic Chemical 6 of 13 results May 20, 2024 Nov 6, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 6 of 6 results Mar 15, 2012 Nov 19, 2013
Sodium 1052 Inorganic Chemical 5 of 5 results Oct 14, 2019 Aug 3, 2026
Nitrate-Nitrite 1038 Inorganic Chemical 5 of 55 results Dec 4, 2019 Apr 1, 2025
Nitrite 1041 Inorganic Chemical 5 of 55 results Jul 9, 2008 Apr 1, 2025
Chloroform 2941 Organic Chemical 5 of 13 results Aug 21, 2013 Mar 6, 2025
Nickel 1036 Inorganic Chemical 5 of 22 results Mar 15, 2004 Dec 4, 2024
Bromodichloromethane 2943 Organic Chemical 5 of 13 results Aug 21, 2013 Aug 21, 2024
Selenium 1045 Inorganic Chemical 5 of 22 results Apr 4, 2005 May 5, 2020
Dibromoacetic Acid 2454 Organic Chemical 4 of 13 results May 20, 2024 Aug 21, 2024
Trichloroacetic Acid 2452 Organic Chemical 2 of 13 results Mar 6, 2025 Mar 6, 2025
Monochloroacetic Acid 2450 Organic Chemical 2 of 13 results May 20, 2024 May 20, 2024
Nitrate 1040 Inorganic Chemical 2 of 55 results Dec 4, 2019 Dec 4, 2019
Gross Alpha Particle Activity 4109 Radionuclide 2 of 2 results Sep 12, 2013 Sep 12, 2013
Xylenes, Total 2955 Organic Chemical 2 of 35 results Jul 30, 2013 Jul 30, 2013
Monobromoacetic Acid 2453 Organic Chemical 1 of 13 results Oct 8, 2020 Oct 8, 2020
Arsenic 1005 Inorganic Chemical 1 of 22 results May 5, 2020 May 5, 2020
Thallium, Total 1085 Inorganic Chemical 1 of 22 results May 5, 2020 May 5, 2020
Combined Radium (-226 & -228) 4010 Radionuclide 1 of 8 results Sep 12, 2013 Sep 12, 2013
Radium-226 4020 Radionuclide 1 of 8 results Sep 12, 2013 Sep 12, 2013

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 61–70 of 244 samples, newest first — collected May 5, 2020 to November 4, 2020. The summary above covers all 244.

45 results from the 10 samples listed here: 19 detected, 26 not detected. Across the whole record it is 249 of 1,490. 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 Oktoc Water Association #1, every result from 61 to 70 of 244 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 4, 2020 07:42
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201106-007PB
Laboratory
MSDH Lab
0.0042 mg/l , sample collected Nov 4, 2020 07:42, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
0.0016 mg/l , sample collected Nov 4, 2020 07:42, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Nov 4, 2020 06:35
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201106-006PB
Laboratory
MSDH Lab
0.1742 mg/l , sample collected Nov 4, 2020 06:35, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 4, 2020 06:35, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Nov 4, 2020 06:32
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201106-005PB
Laboratory
MSDH Lab
0.1291 mg/l , sample collected Nov 4, 2020 06:32, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 4, 2020 06:32, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Nov 4, 2020 05:54
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201106-003PB
Laboratory
MSDH Lab
0.2333 mg/l , sample collected Nov 4, 2020 05:54, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 4, 2020 05:54, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Nov 4, 2020 05:45
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201106-002PB
Laboratory
MSDH Lab
0.3797 mg/l , sample collected Nov 4, 2020 05:45, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Nov 4, 2020 05:45, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Nov 4, 2020 06:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
201106-001PB
Laboratory
MSDH Lab
0.0665 mg/l , sample collected Nov 4, 2020 06:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
0.0007 mg/l , sample collected Nov 4, 2020 06:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2020
Collected
Oct 8, 2020 14:21
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
201009-003TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 8, 2020 14:21, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 8, 2020 14:21, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 8, 2020 14:21, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 8, 2020 14:21, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Oct 8, 2020 14:21, sampling point MRT000 TTHM 2950 Not recorded
Collected
Oct 8, 2020 14:45
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
201009-003HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Oct 8, 2020 14:45, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2020 14:45, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2020 14:45, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Oct 8, 2020 14:45, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Oct 8, 2020 14:45, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Oct 8, 2020 14:45, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
May 5, 2020 13:15
Sampling point
TF104 Treatment Facility TF104
Sample type
Routine
Lab sample
200506-002IN
Laboratory
MSDH Lab
0.0005 mg/l , sample collected May 5, 2020 13:15, sampling point TF104 Arsenic 1005 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.041 mg/l , sample collected May 5, 2020 13:15, sampling point TF104 Barium 1010 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Cadmium 1015 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.0018 mg/l , sample collected May 5, 2020 13:15, sampling point TF104 Chromium 1020 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.155 mg/l , sample collected May 5, 2020 13:15, sampling point TF104 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Mercury 1035 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Selenium 1045 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Antimony, Total 1074 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:15, sampling point TF104 Thallium, Total 1085 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
May 5, 2020 13:00
Sampling point
TF103 Treatment Facility TF103
Sample type
Routine
Lab sample
200506-001IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:00, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.0357 mg/l , sample collected May 5, 2020 13:00, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:00, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.0014 mg/l , sample collected May 5, 2020 13:00, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.17 mg/l , sample collected May 5, 2020 13:00, sampling point TF103 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:00, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:00, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
0.0028 mg/l , sample collected May 5, 2020 13:00, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:00, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 5, 2020 13:00, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.0006 mg/l , sample collected May 5, 2020 13:00, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021

Routine (10).