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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

MS0700014 , Three Forks Water Association

22 of the 57 analytes this system has been tested for have been detected at least once, across 207 samples on record.

The other 35 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 207 samples on record, detections range from October 29, 2003 to July 20, 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 Three Forks Water Association, 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 16, 2007 Aug 10, 2023
Lead 1030 Inorganic Chemical 41 of 60 results Aug 16, 2007 Aug 10, 2023
Barium 1010 Inorganic Chemical 20 of 20 results Oct 29, 2003 Mar 31, 2025
Fluoride 1025 Inorganic Chemical 20 of 20 results Oct 29, 2003 Mar 31, 2025
Nickel 1036 Inorganic Chemical 15 of 20 results Mar 31, 2004 Mar 31, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 21, 2011 Jul 11, 2012
Chromium 1020 Inorganic Chemical 9 of 20 results Mar 31, 2004 Mar 31, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Oct 7, 2019 Jul 20, 2026
TTHM 2950 Organic Chemical 5 of 17 results Sep 11, 2007 Nov 25, 2024
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 18 results Jul 15, 2010 Nov 25, 2024
Sulfate 1055 Inorganic Chemical 4 of 4 results Oct 29, 2003 Mar 31, 2004
Dichloroacetic Acid 2451 Organic Chemical 3 of 13 results Oct 29, 2020 Nov 25, 2024
Chloroform 2941 Organic Chemical 3 of 13 results Sep 13, 2016 Nov 25, 2024
Nitrite 1041 Inorganic Chemical 3 of 43 results May 20, 2020 Apr 6, 2022
Nitrate-Nitrite 1038 Inorganic Chemical 3 of 43 results Apr 4, 2011 May 20, 2020
Trichloroacetic Acid 2452 Organic Chemical 2 of 13 results Nov 25, 2024 Nov 25, 2024
Bromodichloromethane 2943 Organic Chemical 2 of 13 results Nov 25, 2024 Nov 25, 2024
Dibromochloromethane 2944 Organic Chemical 2 of 13 results Nov 25, 2024 Nov 25, 2024
Nitrate 1040 Inorganic Chemical 2 of 43 results Apr 4, 2011 Apr 4, 2011
Selenium 1045 Inorganic Chemical 2 of 20 results Mar 1, 2010 Mar 1, 2010
Cadmium 1015 Inorganic Chemical 2 of 20 results Mar 31, 2004 Mar 31, 2004
Monobromoacetic Acid 2453 Organic Chemical 1 of 13 results Oct 29, 2020 Oct 29, 2020

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 21–30 of 207 samples, newest first — collected August 10, 2023 to July 10, 2024. The summary above covers all 207.

19 results from the 10 samples listed here: 7 detected, 12 not detected. Across the whole record it is 219 of 1,035. 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 5 sampling points 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 Three Forks Water Association, every result from 21 to 30 of 207 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 10, 2024 13:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-240711-020
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 10, 2024 13:30, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Apr 17, 2024 15:45
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-240418-062
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 15:45, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 15:45, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 15:45, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Apr 17, 2024 15:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-240418-061
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 15:30, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 15:30, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 17, 2024 15:30, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Sep 12, 2023 13:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
TH-230913-014
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 13:00, sampling point MRT000 TTHM 2950 EPA method 524.2 Not recorded
Collected
Sep 12, 2023 13:30
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
HA-230913-014
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 12, 2023 13:30, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Aug 10, 2023 06:00
Sampling point
LC0013 Location withheld
Sample type
Routine
Lab sample
PB-230811-072
Laboratory
MSDH Lab
0.0212 mg/l , sample collected Aug 10, 2023 06:00, sampling point LC0013 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 10, 2023 06:00, sampling point LC0013 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 10, 2023 07:00
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-230811-067
Laboratory
MSDH Lab
0.0199 mg/l , sample collected Aug 10, 2023 07:00, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 10, 2023 07:00, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 10, 2023 07:00
Sampling point
LC0017 Location withheld
Sample type
Routine
Lab sample
PB-230811-068
Laboratory
MSDH Lab
0.0644 mg/l , sample collected Aug 10, 2023 07:00, sampling point LC0017 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
0.6 ug/l , sample collected Aug 10, 2023 07:00, sampling point LC0017 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 10, 2023 06:00
Sampling point
LC0018 Location withheld
Sample type
Routine
Lab sample
PB-230811-069
Laboratory
MSDH Lab
0.005 mg/l , sample collected Aug 10, 2023 06:00, sampling point LC0018 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
1.1 ug/l , sample collected Aug 10, 2023 06:00, sampling point LC0018 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Collected
Aug 10, 2023 06:30
Sampling point
LC0011 Location withheld
Sample type
Routine
Lab sample
PB-230811-070
Laboratory
MSDH Lab
0.0034 mg/l , sample collected Aug 10, 2023 06:30, sampling point LC0011 Copper, Free 1022 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 10, 2023 06:30, sampling point LC0011 Lead 1030 EPA method 200.8 Jan 1, 2021 – Dec 31, 2023

Routine (10).