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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 41–50 of 89 samples, newest first — collected August 28, 2017 to August 20, 2018. The summary above covers all 89.

66 results from the 10 samples listed here: 7 detected, 59 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 41 to 50 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
Aug 20, 2018 12:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
180821-001HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2017 – Dec 31, 2019
Collected
Aug 20, 2018 12:00
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
180821-001TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Aug 20, 2018 12:00, sampling point MRT000 TTHM 2950 Jan 1, 2017 – Dec 31, 2019
Collected
Jun 25, 2018 12:10
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
180626-013VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Dichloromethane 2964 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Benzene 2990 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Toluene 2991 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jun 25, 2018 12:10, sampling point TF081 Styrene 2996 EPA method 524.2 Jan 1, 2018 – Dec 31, 2018
Collected
Jun 5, 2018 07:12
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
180607-070PB
Laboratory
MSDH Lab
0.0665 mg/l , sample collected Jun 5, 2018 07:12, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 5, 2018 07:12, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Collected
Jun 5, 2018 06:29
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
180607-067PB
Laboratory
MSDH Lab
0.0376 mg/l , sample collected Jun 5, 2018 06:29, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 5, 2018 06:29, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Collected
Jun 4, 2018 05:00
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
180607-069PB
Laboratory
MSDH Lab
0.0158 mg/l , sample collected Jun 4, 2018 05:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 4, 2018 05:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Collected
Jun 4, 2018 07:00
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
180607-068PB
Laboratory
MSDH Lab
0.0186 mg/l , sample collected Jun 4, 2018 07:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 4, 2018 07:00, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Collected
Jun 4, 2018
Sampling point
DS000 Distribution DS000
Sample type
Routine
Lab sample
180607-066PB
Laboratory
MSDH Lab
0.0292 mg/l , sample collected Jun 4, 2018, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 4, 2018, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2018 – Dec 31, 2018
Collected
Feb 26, 2018 12:00
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
180227-085NI
Laboratory
MSDH Lab
0.62 mg/l , sample collected Feb 26, 2018 12:00, sampling point TF081 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
0.62 mg/l , sample collected Feb 26, 2018 12:00, sampling point TF081 Nitrate 1040 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 26, 2018 12:00, sampling point TF081 Nitrite 1041 EPA method QC10107041C Jan 1, 2018 – Dec 31, 2018
Collected
Aug 28, 2017 12:00
Sampling point
TF081 TF081
Sample type
Routine
Lab sample
170829-013VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Dichloromethane 2964 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Benzene 2990 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Toluene 2991 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 28, 2017 12:00, sampling point TF081 Styrene 2996 EPA method 524.2 Jan 1, 2017 – Dec 31, 2017

Routine (10).