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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

MS0360069 , Twelve Oaks Water System

11 of the 55 analytes this system has been tested for have been detected at least once, across 89 samples on record.

The other 44 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 89 samples on record, detections range from September 17, 2014 to July 6, 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 Twelve Oaks Water System, 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 40 of 40 results Oct 26, 2015 Sep 17, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 13 of 13 results Nov 17, 2014 Jul 6, 2026
Nitrate 1040 Inorganic Chemical 13 of 13 results Nov 17, 2014 Jul 6, 2026
Lead 1030 Inorganic Chemical 7 of 40 results Oct 26, 2015 Sep 17, 2025
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 18, 2019 Feb 25, 2025
Barium 1010 Inorganic Chemical 3 of 3 results Apr 13, 2015 Feb 5, 2024
Chromium 1020 Inorganic Chemical 3 of 3 results Apr 13, 2015 Feb 5, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 2 of 2 results Sep 17, 2014 Dec 8, 2014
Combined Radium (-226 & -228) 4010 Radionuclide 2 of 2 results Sep 17, 2014 Dec 8, 2014
Radium-226 4020 Radionuclide 2 of 2 results Sep 17, 2014 Dec 8, 2014
Radium-228 4030 Radionuclide 1 of 2 results Sep 17, 2014 Sep 17, 2014

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 11–20 of 89 samples, newest first — collected June 14, 2022 to February 25, 2025. The summary above covers all 89.

46 results from the 10 samples listed here: 9 detected, 37 not detected. Across the whole record it is 89 of 427. 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 Twelve Oaks Water System, every result from 11 to 20 of 89 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
Feb 25, 2025 10:29
Sampling point
SMD Pressure Tank @ WL001
Sample type
Routine
Lab sample
HA-250226-008
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 25, 2025 10:29, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2024 09:39
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
NI-240326-010
Laboratory
MSDH Lab
0.527 mg/l , sample collected Mar 25, 2024 09:39, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
0.527 mg/l , sample collected Mar 25, 2024 09:39, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 25, 2024 09:39, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2024 – Dec 31, 2024
Collected
Feb 5, 2024 11:20
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
IN-240206-031
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0253 mg/l , sample collected Feb 5, 2024 11:20, sampling point TF081 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0015 mg/l , sample collected Feb 5, 2024 11:20, sampling point TF081 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 5, 2024 11:20, sampling point TF081 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jun 7, 2023 09:00
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
RU-230608-001
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 7, 2023 09:00, sampling point TF081 Combined Uranium 4006 EPA method 200.8 Jan 1, 2015 – Dec 31, 2023
Collected
Feb 21, 2023 08:25
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
NI-230222-048
Laboratory
MSDH Lab
0.572 mg/l , sample collected Feb 21, 2023 08:25, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
0.572 mg/l , sample collected Feb 21, 2023 08:25, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 21, 2023 08:25, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
Dec 13, 2022 08:35
Sampling point
SMD Pressure Tank @ WL001
Sample type
Routine
Lab sample
HA-221214-027
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 13, 2022 08:35, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2020 – Dec 31, 2022
Collected
Dec 13, 2022 08:30
Sampling point
SMD Pressure Tank @ WL001
Sample type
Routine
Lab sample
TH-221214-027
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 13, 2022 08:30, sampling point SMD TTHM 2950 EPA method 524.2 Jan 1, 2020 – Dec 31, 2022
Collected
Nov 30, 2022 08:21
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
VO-221201-024
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Dichloromethane 2964 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Benzene 2990 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Toluene 2991 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 30, 2022 08:21, sampling point TF081 Styrene 2996 EPA method 524.2 Jan 1, 2022 – Dec 31, 2022
Collected
Jun 14, 2022 09:05
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
PB-220615-090
Laboratory
MSDH Lab
0.0298 mg/l , sample collected Jun 14, 2022 09:05, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.6 ug/l , sample collected Jun 14, 2022 09:05, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jun 14, 2022 09:09
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
PB-220615-089
Laboratory
MSDH Lab
0.0229 mg/l , sample collected Jun 14, 2022 09:09, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 14, 2022 09:09, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022

Routine (10).