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
MS0250024 , St Thomas Water Association
40 of the 74 analytes this system has been tested for have been detected at least once, across 307 samples on record.
The other 34 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 307 samples on record, detections range from August 9, 1993 to June 17, 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.
| Analyte | Kind | Detected in | First detected | Last detected |
|---|---|---|---|---|
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 64 of 68 results | Sep 13, 2004 | Jun 17, 2026 |
| TTHM 2950 | Organic Chemical | 64 of 67 results | Sep 29, 2004 | Jun 17, 2026 |
| Copper, Free 1022 | Inorganic Chemical | 64 of 71 results | Aug 9, 1993 | Jun 30, 2023 |
| Lead 1030 | Inorganic Chemical | 47 of 71 results | Aug 9, 1993 | Jun 29, 2023 |
| Chloroform 2941 | Organic Chemical | 25 of 28 results | May 15, 2006 | Jun 17, 2026 |
| Bromodichloromethane 2943 | Organic Chemical | 22 of 28 results | May 15, 2006 | Jun 17, 2026 |
| Trichloroacetic Acid 2452 | Organic Chemical | 20 of 23 results | Jan 28, 2008 | Jun 17, 2026 |
| Dichloroacetic Acid 2451 | Organic Chemical | 19 of 23 results | Jan 28, 2008 | Jun 17, 2026 |
| Fluoride 1025 | Inorganic Chemical | 17 of 17 results | Sep 17, 2003 | Feb 18, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 15 of 28 results | May 15, 2006 | Jun 17, 2026 |
| Barium 1010 | Inorganic Chemical | 15 of 15 results | Sep 17, 2003 | Feb 18, 2025 |
| Gross Alpha, Incl. Radon & U 4002 | Radionuclide | 10 of 10 results | Dec 12, 2011 | Jul 10, 2012 |
| Chromium 1020 | Inorganic Chemical | 9 of 15 results | Sep 17, 2003 | May 17, 2022 |
| Monochloroacetic Acid 2450 | Organic Chemical | 7 of 23 results | Jan 28, 2008 | Jan 4, 2010 |
| Sulfate 1055 | Inorganic Chemical | 6 of 6 results | Sep 17, 2003 | Dec 16, 2008 |
| Sodium 1052 | Inorganic Chemical | 5 of 5 results | Dec 16, 2008 | Feb 7, 2024 |
| Nickel 1036 | Inorganic Chemical | 4 of 15 results | Mar 14, 2005 | Apr 16, 2008 |
| Nitrate 1040 | Inorganic Chemical | 3 of 33 results | May 10, 2004 | Feb 19, 2014 |
| Dibromoacetic Acid 2454 | Organic Chemical | 3 of 23 results | Jan 28, 2008 | Jan 4, 2010 |
| Selenium 1045 | Inorganic Chemical | 3 of 15 results | Mar 13, 2005 | Apr 16, 2008 |
| Nitrite 1041 | Inorganic Chemical | 2 of 33 results | Apr 23, 2007 | Feb 1, 2023 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 2 of 33 results | Feb 19, 2014 | Feb 19, 2014 |
| Calcium 1016 | Inorganic Chemical | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Chloride 1017 | Inorganic Chemical | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Magnesium 1031 | Inorganic Chemical | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Manganese 1032 | Inorganic Chemical | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Potassium 1042 | Inorganic Chemical | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Residue, Total, Filterable 1057 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Alkalinity, Caco3 Stability 1067 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Carbon Dioxide 1901 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Color 1905 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Hardness, Total (As Caco3) 1915 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| PH 1925 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Alkalinity, Total 1927 | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Iron, Field Result FEFD | Inorganic Chemical | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Calculated Sodium NACA | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| PH, Field Result PHFD | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Temperature, Field Result TEMP | Water Quality | 2 of 2 results | Dec 16, 2008 | Dec 16, 2008 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 23 results | Jan 4, 2010 | Jan 4, 2010 |
| Thallium, Total 1085 | Inorganic Chemical | 1 of 15 results | Mar 13, 2005 | Mar 13, 2005 |
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 211–220 of 307 samples, newest first — collected March 5, 2007 to October 9, 2007. The summary above covers all 307.
26 results from the 10 samples listed here: 14 detected, 12 not detected. Across the whole record it is 460 of 1,194. 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 |
|---|---|---|
|
||
| 0.0727 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Oct 9, 2007, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Oct 1, 2007 – Dec 31, 2007 |
|
||
| 102 ug/l , sample collected Oct 8, 2007, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Oct 8, 2007, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 37.8 ug/l , sample collected Oct 8, 2007, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 9.83 ug/l , sample collected Oct 8, 2007, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 149.63 ug/l , sample collected Oct 8, 2007, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Oct 1, 2007 – Dec 31, 2007 |
|
||
| 0.0194 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jul 16, 2007, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jul 1, 2007 – Sep 30, 2007 |
|
||
| 5.62 ug/l , sample collected Jul 16, 2007, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 16, 2007, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 16, 2007, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 16, 2007, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 5.62 ug/l , sample collected Jul 16, 2007, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jul 1, 2007 – Sep 30, 2007 |
|
||
| 0.0118 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Jun 26, 2007, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Apr 1, 2007 – Jun 30, 2007 |
|
||
| 2.64 ug/l , sample collected Jun 5, 2007, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 5, 2007, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 5, 2007, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 5, 2007, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 2.64 ug/l , sample collected Jun 5, 2007, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Apr 1, 2007 – Jun 30, 2007 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 23, 2007, sampling point TF102 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 23, 2007, sampling point TF102 | Nitrate 1040 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| 0.02 mg/l , sample collected Apr 23, 2007, sampling point TF102 | Nitrite 1041 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 23, 2007, sampling point TF101 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 23, 2007, sampling point TF101 | Nitrate 1040 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 23, 2007, sampling point TF101 | Nitrite 1041 EPA method 353.2 | Jan 1, 2007 – Dec 31, 2007 |
|
||
| 0.075 mg/l , sample collected Mar 12, 2007, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2007 – Mar 31, 2007 |
|
||
| 0.0587 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Mar 5, 2007, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Jan 1, 2007 – Mar 31, 2007 |
-
- Collected
- Oct 9, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 071010-024HA
- Laboratory
- MSDH Lab
- Monitoring period
- Oct 1, 2007 – Dec 31, 2007
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.0727 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
-
- Collected
- Oct 8, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 071010-005TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 102 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 37.8 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 9.83 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 149.63 ug/l
- Monitoring period
- Oct 1, 2007 – Dec 31, 2007
-
- Collected
- Jul 16, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 070717-016HA
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2007 – Sep 30, 2007
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.0194 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
-
- Collected
- Jul 16, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 070717-016TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 5.62 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 5.62 ug/l
- Monitoring period
- Jul 1, 2007 – Sep 30, 2007
-
- Collected
- Jun 26, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 070627-024HA
- Laboratory
- MSDH Lab
- Monitoring period
- Apr 1, 2007 – Jun 30, 2007
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.0118 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
-
- Collected
- Jun 5, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 070606-002TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 2.64 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 2.64 ug/l
- Monitoring period
- Apr 1, 2007 – Jun 30, 2007
-
- Collected
- Apr 23, 2007
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 070424-119NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2007 – Dec 31, 2007
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- 0.02 mg/l
-
- Collected
- Apr 23, 2007
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 070424-118NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2007 – Dec 31, 2007
-
Nitrate-Nitrite 1038 EPA method 353.2
- Result
- Not detected below 0.1 mg/l Minimum Reporting Level
-
Nitrate 1040 EPA method 353.2
- Result
- Not detected below 0.08 mg/l Minimum Reporting Level
-
Nitrite 1041 EPA method 353.2
- Result
- Not detected below 0.02 mg/l Minimum Reporting Level
-
- Collected
- Mar 12, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 070313-002HA
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2007 – Mar 31, 2007
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.075 mg/l
-
- Collected
- Mar 5, 2007
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 070306-002HA
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2007 – Mar 31, 2007
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.0587 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType.
Routine (10).