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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 131–140 of 397 samples, newest first — collected June 25, 2010 to June 25, 2010. The summary above covers all 397.

20 results from the 10 samples listed here: 16 detected, 4 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 131 to 140 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
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-010PB
Laboratory
MSDH Lab
0.021 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-009PB
Laboratory
MSDH Lab
0.0412 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
0.001 mg/l , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-008PB
Laboratory
MSDH Lab
0.0926 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
0.0024 mg/l , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-007PB
Laboratory
MSDH Lab
0.0953 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
0.002 mg/l , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-006PB
Laboratory
MSDH Lab
0.0162 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-005PB
Laboratory
MSDH Lab
0.0335 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-004PB
Laboratory
MSDH Lab
0.0266 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-003PB
Laboratory
MSDH Lab
0.0865 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
0.0012 mg/l , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-002PB
Laboratory
MSDH Lab
0.0251 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
0.0011 mg/l , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
Collected
Jun 25, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100628-001PB
Laboratory
MSDH Lab
0.101 mg/l , sample collected Jun 25, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010
0.0007 mg/l , sample collected Jun 25, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2010 – Dec 31, 2010

Routine (10).