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
MS0090024 , Thorn Water Association
28 of the 57 analytes this system has been tested for have been detected at least once, across 419 samples on record.
The other 29 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 419 samples on record, detections range from November 30, 1993 to June 29, 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.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Copper, Free 1022 | Inorganic Chemical | 115 of 149 results | Nov 30, 1993 | Jun 17, 2025 |
| Lead 1030 | Inorganic Chemical | 99 of 149 results | Nov 30, 1993 | Jun 17, 2025 |
| Barium 1010 | Inorganic Chemical | 31 of 31 results | Mar 19, 2002 | Jun 29, 2026 |
| Fluoride 1025 | Inorganic Chemical | 31 of 31 results | Mar 19, 2002 | Jun 29, 2026 |
| Xylenes, Total 2955 | Organic Chemical | 23 of 76 results | Jul 6, 2004 | Aug 2, 2010 |
| Chromium 1020 | Inorganic Chemical | 17 of 31 results | Mar 19, 2002 | Jan 13, 2025 |
| TTHM 2950 | Organic Chemical | 16 of 23 results | Jul 11, 2007 | Apr 20, 2026 |
| Arsenic 1005 | Inorganic Chemical | 13 of 31 results | Feb 14, 2005 | Jan 9, 2024 |
| Nickel 1036 | Inorganic Chemical | 11 of 29 results | Feb 14, 2005 | Apr 21, 2014 |
| Bromoform 2942 | Organic Chemical | 10 of 18 results | Dec 13, 2023 | Apr 20, 2026 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 10 of 15 results | Mar 5, 2012 | Oct 3, 2012 |
| Selenium 1045 | Inorganic Chemical | 9 of 31 results | Jan 12, 2004 | Mar 24, 2008 |
| Dibromochloromethane 2944 | Organic Chemical | 8 of 18 results | Dec 13, 2023 | Apr 20, 2026 |
| Sodium 1052 | Inorganic Chemical | 8 of 8 results | Sep 23, 2019 | Oct 14, 2024 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 7 of 23 results | Jul 11, 2007 | Feb 21, 2024 |
| Nitrite 1041 | Inorganic Chemical | 4 of 65 results | Jun 5, 2006 | Nov 28, 2006 |
| Ethylbenzene 2992 | Organic Chemical | 4 of 76 results | Jul 6, 2004 | Jan 26, 2005 |
| Cyanide 1024 | Inorganic Chemical | 3 of 27 results | Dec 4, 2006 | May 2, 2018 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 3 of 65 results | May 3, 2004 | Nov 28, 2006 |
| Sulfate 1055 | Inorganic Chemical | 3 of 4 results | Mar 19, 2002 | Jan 12, 2004 |
| Dibromoacetic Acid 2454 | Organic Chemical | 2 of 16 results | Dec 13, 2023 | Jul 30, 2024 |
| Cadmium 1015 | Inorganic Chemical | 2 of 31 results | Feb 14, 2005 | Feb 14, 2005 |
| Toluene 2991 | Organic Chemical | 2 of 76 results | Jan 26, 2005 | Jan 26, 2005 |
| Dichloroacetic Acid 2451 | Organic Chemical | 1 of 16 results | Feb 21, 2024 | Feb 21, 2024 |
| Trichloroacetic Acid 2452 | Organic Chemical | 1 of 16 results | Feb 21, 2024 | Feb 21, 2024 |
| Monochloroacetic Acid 2450 | Organic Chemical | 1 of 16 results | Jul 13, 2020 | Jul 13, 2020 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 16 results | Jul 12, 2011 | Jul 12, 2011 |
| Nitrate 1040 | Inorganic Chemical | 1 of 65 results | May 3, 2004 | May 3, 2004 |
Showing samples collected between September 26, 2024 and September 26, 2026. That is this page’s default, not a limit on what the agency records.
Choose a date range
The most recent samples, result by result
The table below lists 21–23 of 23 samples, newest first — collected October 14, 2024 to October 28, 2024. The summary above covers all 23.
3 results from the 3 samples listed here: 2 detected, 1 not detected. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
| Result | Analyte | Monitoring period |
|---|---|---|
|
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| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 28, 2024 10:00, sampling point TF103 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2022 – Dec 31, 2024 |
|
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| 102 mg/l , sample collected Oct 14, 2024 12:40, sampling point TF103 | Sodium 1052 EPA method 200.7 | Jan 1, 2022 – Dec 31, 2024 |
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| 104 mg/l , sample collected Oct 14, 2024 12:52, sampling point TF102 | Sodium 1052 EPA method 200.7 | Jan 1, 2022 – Dec 31, 2024 |
-
- Collected
- Oct 28, 2024 10:00
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- CN-241029-002
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2022 – Dec 31, 2024
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Oct 14, 2024 12:40
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- NA-241015-049
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2022 – Dec 31, 2024
-
Sodium 1052 EPA method 200.7
- Result
- 102 mg/l
-
- Collected
- Oct 14, 2024 12:52
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- NA-241015-048
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2022 – Dec 31, 2024
-
Sodium 1052 EPA method 200.7
- Result
- 104 mg/l
Routine (3).