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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

MS0140008 , Town of Jonestown

24 of the 57 analytes this system has been tested for have been detected at least once, across 397 samples on record.

The other 33 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 397 samples on record, detections range from November 22, 1993 to November 18, 2025. 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 Town of Jonestown, 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 203 of 259 results Nov 22, 1993 Jun 22, 2023
Lead 1030 Inorganic Chemical 197 of 259 results Nov 22, 1993 Jun 22, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 17 of 21 results Jul 12, 2007 Nov 18, 2025
TTHM 2950 Organic Chemical 17 of 21 results Jul 12, 2007 Nov 18, 2025
Barium 1010 Inorganic Chemical 15 of 15 results Apr 30, 2002 Feb 3, 2025
Fluoride 1025 Inorganic Chemical 14 of 15 results Apr 30, 2002 Feb 3, 2025
Chloroform 2941 Organic Chemical 13 of 16 results Jul 12, 2007 Nov 18, 2025
Bromoform 2942 Organic Chemical 13 of 16 results Jul 12, 2007 Nov 18, 2025
Bromodichloromethane 2943 Organic Chemical 13 of 16 results Jul 12, 2007 Nov 18, 2025
Dibromochloromethane 2944 Organic Chemical 13 of 16 results Jul 12, 2007 Nov 18, 2025
Dibromoacetic Acid 2454 Organic Chemical 11 of 14 results Aug 30, 2011 Nov 18, 2025
Chromium 1020 Inorganic Chemical 11 of 15 results Apr 30, 2002 Feb 3, 2025
Selenium 1045 Inorganic Chemical 8 of 15 results Sep 8, 2003 Apr 20, 2020
Trichloroacetic Acid 2452 Organic Chemical 5 of 14 results Aug 30, 2011 Nov 18, 2025
Arsenic 1005 Inorganic Chemical 5 of 15 results Dec 12, 2005 Feb 3, 2025
Dichloroacetic Acid 2451 Organic Chemical 4 of 14 results Aug 30, 2011 Nov 18, 2025
Xylenes, Total 2955 Organic Chemical 3 of 44 results Jul 28, 2015 Apr 12, 2016
Cadmium 1015 Inorganic Chemical 3 of 15 results Apr 30, 2002 Dec 12, 2005
Sodium 1052 Inorganic Chemical 2 of 2 results Feb 2, 2021 Oct 14, 2024
Thallium, Total 1085 Inorganic Chemical 1 of 15 results Apr 20, 2020 Apr 20, 2020
Monochloroacetic Acid 2450 Organic Chemical 1 of 14 results Jul 24, 2018 Jul 24, 2018
Ethylbenzene 2992 Organic Chemical 1 of 44 results Jul 28, 2015 Jul 28, 2015
Nickel 1036 Inorganic Chemical 1 of 15 results Mar 26, 2008 Mar 26, 2008
Sulfate 1055 Inorganic Chemical 1 of 4 results Apr 30, 2002 Apr 30, 2002

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 111–120 of 397 samples, newest first — collected September 26, 2011 to February 14, 2012. The summary above covers all 397.

31 results from the 10 samples listed here: 9 detected, 22 not detected. Across the whole record it is 572 of 1,900. 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 Town of Jonestown, every result from 111 to 120 of 397 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 14, 2012 12:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120215-104RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 14, 2012 12:30, sampling point TF101 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012
Collected
Jan 23, 2012 03:50
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
120124-112NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 23, 2012 03:50, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 23, 2012 03:50, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 23, 2012 03:50, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Dec 14, 2011 13:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
111215-075
Laboratory
Radiation Safety Engineering
Not detected below 0.41 pci/l Minimum Reporting Level , sample collected Dec 14, 2011 13:30, sampling point TF101 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.27 pci/l Minimum Reporting Level , sample collected Dec 14, 2011 13:30, sampling point TF101 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.248 pci/l Minimum Reporting Level , sample collected Dec 14, 2011 13:30, sampling point TF101 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.27 pci/l Minimum Reporting Level , sample collected Dec 14, 2011 13:30, sampling point TF101 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011
Collected
Dec 14, 2011 01:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
111215-001IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.0021 mg/l , sample collected Dec 14, 2011 01:40, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.134 mg/l , sample collected Dec 14, 2011 01:40, sampling point TF101 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Dec 14, 2011 01:40, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Sep 26, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110928-047PB
Laboratory
MSDH Lab
0.0044 mg/l , sample collected Sep 26, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 26, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Collected
Sep 26, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110928-046PB
Laboratory
MSDH Lab
0.0025 mg/l , sample collected Sep 26, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 26, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Collected
Sep 26, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110928-045PB
Laboratory
MSDH Lab
0.0022 mg/l , sample collected Sep 26, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 26, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Collected
Sep 26, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110928-044PB
Laboratory
MSDH Lab
0.002 mg/l , sample collected Sep 26, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 26, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Collected
Sep 26, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110928-043PB
Laboratory
MSDH Lab
0.0024 mg/l , sample collected Sep 26, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 26, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
Collected
Sep 26, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110928-042PB
Laboratory
MSDH Lab
0.0033 mg/l , sample collected Sep 26, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011
0.001 mg/l , sample collected Sep 26, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2011 – Dec 31, 2011

Routine (10).