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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; 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 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

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

Choose a date range

The most recent samples, result by result

The table below lists 1–10 of 11 samples, newest first — collected February 25, 2025 to July 6, 2026. The summary above covers all 11.

19 results from the 10 samples listed here: 11 detected, 8 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.

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 Twelve Oaks Water System, every result from 1 to 10 of 11 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 6, 2026
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
35048648001
Laboratory
Pace Analytical Services, LLC
0.45 mg/l , sample collected Jul 6, 2026, sampling point TF081 Nitrate-Nitrite 1038 Not recorded
0.45 mg/l , sample collected Jul 6, 2026, sampling point TF081 Nitrate 1040 EPA method 353.2 Not recorded
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jul 6, 2026, sampling point TF081 Nitrite 1041 EPA method 353.2 Not recorded
Collected
Sep 17, 2025 09:18
Sampling point
LC005 Location withheld
Sample type
Routine
Lab sample
PB-250918-056
Laboratory
MSDH Lab
0.0048 mg/l , sample collected Sep 17, 2025 09:18, sampling point LC005 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 Sep 17, 2025 09:18, sampling point LC005 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 17, 2025 09:11
Sampling point
LC004 Location withheld
Sample type
Routine
Lab sample
PB-250918-055
Laboratory
MSDH Lab
0.004 mg/l , sample collected Sep 17, 2025 09:11, sampling point LC004 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 Sep 17, 2025 09:11, sampling point LC004 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 17, 2025 09:00
Sampling point
LC003 Location withheld
Sample type
Routine
Lab sample
PB-250918-054
Laboratory
MSDH Lab
0.0039 mg/l , sample collected Sep 17, 2025 09:00, sampling point LC003 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 Sep 17, 2025 09:00, sampling point LC003 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 17, 2025 08:54
Sampling point
LC002 Location withheld
Sample type
Routine
Lab sample
PB-250918-053
Laboratory
MSDH Lab
0.0061 mg/l , sample collected Sep 17, 2025 08:54, sampling point LC002 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.7 ug/l , sample collected Sep 17, 2025 08:54, sampling point LC002 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 17, 2025 08:50
Sampling point
LC001 Location withheld
Sample type
Routine
Lab sample
PB-250918-052
Laboratory
MSDH Lab
0.0053 mg/l , sample collected Sep 17, 2025 08:50, sampling point LC001 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 Sep 17, 2025 08:50, sampling point LC001 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Sep 9, 2025 09:40
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
CN-250910-008
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Sep 9, 2025 09:40, sampling point TF081 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Mar 11, 2025 08:30
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
NI-250312-035
Laboratory
MSDH Lab
0.353 mg/l , sample collected Mar 11, 2025 08:30, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
0.353 mg/l , sample collected Mar 11, 2025 08:30, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 11, 2025 08:30, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 25, 2025 10:20
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
NA-250226-025
Laboratory
MSDH Lab
3.86 mg/l , sample collected Feb 25, 2025 10:20, sampling point TF081 Sodium 1052 EPA method 200.7 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 25, 2025 10:24
Sampling point
SMD Pressure Tank @ WL001
Sample type
Routine
Lab sample
TH-250226-008
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 25, 2025 10:24, sampling point SMD TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2025

Routine (10).