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
MS0450024 , PRVWSD-Twin Harbor
28 of the 56 analytes this system has been tested for have been detected at least once, across 310 samples on record.
The other 28 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 310 samples on record, detections range from October 6, 2003 to November 20, 2025. 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 | 135 of 135 results | Jun 29, 2004 | Aug 20, 2024 |
| Lead 1030 | Inorganic Chemical | 67 of 135 results | Jun 29, 2004 | Aug 20, 2024 |
| TTHM 2950 | Organic Chemical | 21 of 21 results | Jul 12, 2004 | Nov 20, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 20 of 21 results | Aug 22, 2007 | Nov 20, 2025 |
| Barium 1010 | Inorganic Chemical | 17 of 17 results | Oct 6, 2003 | Mar 11, 2025 |
| Chloroform 2941 | Organic Chemical | 16 of 16 results | Aug 22, 2007 | Nov 20, 2025 |
| Bromodichloromethane 2943 | Organic Chemical | 16 of 16 results | Aug 22, 2007 | Nov 20, 2025 |
| Fluoride 1025 | Inorganic Chemical | 16 of 17 results | Oct 6, 2003 | Mar 11, 2025 |
| Dichloroacetic Acid 2451 | Organic Chemical | 14 of 15 results | Sep 28, 2009 | Nov 20, 2025 |
| Trichloroacetic Acid 2452 | Organic Chemical | 14 of 15 results | Sep 28, 2009 | Nov 20, 2025 |
| Dibromochloromethane 2944 | Organic Chemical | 11 of 16 results | Aug 7, 2013 | Nov 14, 2024 |
| Xylenes, Total 2955 | Organic Chemical | 7 of 33 results | Mar 29, 2004 | Aug 15, 2007 |
| Sodium 1052 | Inorganic Chemical | 6 of 6 results | Sep 16, 2019 | Feb 24, 2025 |
| Ethylbenzene 2992 | Organic Chemical | 6 of 33 results | Mar 29, 2004 | May 30, 2007 |
| Chromium 1020 | Inorganic Chemical | 5 of 17 results | Oct 6, 2003 | Feb 3, 2010 |
| Toluene 2991 | Organic Chemical | 5 of 33 results | Mar 29, 2004 | May 11, 2006 |
| Cadmium 1015 | Inorganic Chemical | 3 of 17 results | Mar 8, 2004 | Apr 11, 2005 |
| Combined Radium (-226 & -228) 4010 | Radionuclide | 2 of 12 results | Jun 12, 2018 | Sep 12, 2019 |
| Radium-226 4020 | Radionuclide | 2 of 12 results | Jun 12, 2018 | Sep 12, 2019 |
| Radium-228 4030 | Radionuclide | 2 of 12 results | Jun 12, 2018 | Sep 12, 2019 |
| Nitrate 1040 | Inorganic Chemical | 2 of 44 results | Jul 24, 2006 | Jul 24, 2006 |
| Selenium 1045 | Inorganic Chemical | 2 of 17 results | Apr 11, 2005 | Apr 11, 2005 |
| Sulfate 1055 | Inorganic Chemical | 2 of 2 results | Oct 6, 2003 | Mar 8, 2004 |
| Monobromoacetic Acid 2453 | Organic Chemical | 1 of 15 results | Sep 14, 2020 | Sep 14, 2020 |
| Dibromoacetic Acid 2454 | Organic Chemical | 1 of 15 results | Sep 18, 2018 | Sep 18, 2018 |
| Bromoform 2942 | Organic Chemical | 1 of 16 results | Sep 18, 2018 | Sep 18, 2018 |
| Nitrate-Nitrite 1038 | Inorganic Chemical | 1 of 44 results | Jul 24, 2006 | Jul 24, 2006 |
| Nickel 1036 | Inorganic Chemical | 1 of 17 results | Mar 8, 2004 | Mar 8, 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 11–12 of 12 samples, newest first — collected November 14, 2024 to November 14, 2024. The summary above covers all 12.
22 results from the 2 samples listed here: 14 detected, 8 not detected. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
We withheld the location of 1 sampling point below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:58, sampling point SM2 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 14 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 13 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:58, sampling point SM2 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:58, sampling point SM2 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 27 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Oct 1, 2024 – Dec 31, 2024 |
| 38 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:58, sampling point SM2 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 8.6 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 1.5 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 48.1 ug/l , sample collected Nov 14, 2024 08:58, sampling point SM2 | TTHM 2950 EPA method 524.2 | Oct 1, 2024 – Dec 31, 2024 |
|
||
| Not detected below 2 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:50, sampling point SM1 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 14 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 14 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:50, sampling point SM1 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:50, sampling point SM1 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 28 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Oct 1, 2024 – Dec 31, 2024 |
| 37 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Nov 14, 2024 08:50, sampling point SM1 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 8.4 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 1.5 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 46.9 ug/l , sample collected Nov 14, 2024 08:50, sampling point SM1 | TTHM 2950 EPA method 524.2 | Oct 1, 2024 – Dec 31, 2024 |
-
- Collected
- Nov 14, 2024 08:58
- Sampling point
- SM2 Twin Harbor Tank Off Rice Rd
- Sample type
- Routine
- Lab sample
- 810-128373-2
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 14 ug/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 13 ug/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 27 ug/l
- Monitoring period
- Oct 1, 2024 – Dec 31, 2024
-
Chloroform 2941 EPA method 524.2
- Result
- 38 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 8.6 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 1.5 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 48.1 ug/l
- Monitoring period
- Oct 1, 2024 – Dec 31, 2024
-
- Collected
- Nov 14, 2024 08:50
- Sampling point
- SM1 Location withheld
- Sample type
- Routine
- Lab sample
- 810-128373-1
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 2 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 14 ug/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 14 ug/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 1 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 28 ug/l
- Monitoring period
- Oct 1, 2024 – Dec 31, 2024
-
Chloroform 2941 EPA method 524.2
- Result
- 37 ug/l
- Monitoring period
- Not recorded
-
Bromoform 2942 EPA method 524.2
- Result
- Not detected below 0.5 ug/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Bromodichloromethane 2943 EPA method 524.2
- Result
- 8.4 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 1.5 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 46.9 ug/l
- Monitoring period
- Oct 1, 2024 – Dec 31, 2024
Routine (2).