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.
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 |
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 71–80 of 310 samples, newest first — collected April 8, 2019 to September 16, 2019. The summary above covers all 310.
41 results from the 10 samples listed here: 16 detected, 25 not detected. Across the whole record it is 396 of 1,546. 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 |
|---|---|---|
|
||
| 77000 ug/l , sample collected Sep 16, 2019 11:15, sampling point TF103 | Sodium 1052 EPA method 200.7 | Not recorded |
|
||
| 71000 ug/l , sample collected Sep 16, 2019 11:00, sampling point TF102 | Sodium 1052 EPA method 200.7 | Not recorded |
|
||
| 1.01 pci/l , sample collected Sep 12, 2019 13:00, sampling point TF103 | Combined Radium (-226 & -228) 4010 EPA method 7500-RA | Not recorded |
| 0.29 pci/l , sample collected Sep 12, 2019 13:00, sampling point TF103 | Radium-226 4020 EPA method 7500-RAB | Jan 1, 2019 – Dec 31, 2024 |
| 0.72 pci/l , sample collected Sep 12, 2019 13:00, sampling point TF103 | Radium-228 4030 EPA method 7500-RAD | Jan 1, 2019 – Dec 31, 2024 |
|
||
| Not detected below 1.2 pci/l Minimum Reporting Level , sample collected Sep 12, 2019 13:00, sampling point TF103 | Gross Alpha, Incl. Radon & U 4002 EPA method 7110B | Jan 1, 2013 – Dec 31, 2021 |
|
||
| 39.4 ug/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 10.2 ug/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 2.34 ug/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 51.9 ug/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | TTHM 2950 | Jan 1, 2019 – Dec 31, 2019 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.02 mg/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.019 mg/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.04 mg/l , sample collected Aug 21, 2019 13:00, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jan 1, 2019 – Dec 31, 2019 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 10, 2019 09:00, sampling point TF102 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 10, 2019 09:30, sampling point TF103 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0023 mg/l , sample collected Apr 8, 2019 10:45, sampling point TF103 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.261 mg/l , sample collected Apr 8, 2019 10:45, sampling point TF103 | Fluoride 1025 EPA method 300.0 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:45, sampling point TF103 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
|
||
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Arsenic 1005 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.0023 mg/l , sample collected Apr 8, 2019 10:30, sampling point TF102 | Barium 1010 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Cadmium 1015 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Chromium 1020 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| 0.269 mg/l , sample collected Apr 8, 2019 10:30, sampling point TF102 | Fluoride 1025 EPA method 300.0 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Mercury 1035 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Nickel 1036 EPA method 200.8 | Not recorded |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Selenium 1045 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 8, 2019 10:30, sampling point TF102 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2017 – Dec 31, 2019 |
-
- Collected
- Sep 16, 2019 11:15
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- 680-174251-64
- Laboratory
- Test America-Savannah
- Monitoring period
- Not recorded
-
Sodium 1052 EPA method 200.7
- Result
- 77000 ug/l
-
- Collected
- Sep 16, 2019 11:00
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 680-174251-63
- Laboratory
- Test America-Savannah
- Monitoring period
- Not recorded
-
Sodium 1052 EPA method 200.7
- Result
- 71000 ug/l
-
- Collected
- Sep 12, 2019 13:00
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- 4422441
- Laboratory
- Eurofins Eaton Analytical South Bend in
-
Combined Radium (-226 & -228) 4010 EPA method 7500-RA
- Result
- 1.01 pci/l
- Monitoring period
- Not recorded
-
Radium-226 4020 EPA method 7500-RAB
- Result
- 0.29 pci/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2024
-
Radium-228 4030 EPA method 7500-RAD
- Result
- 0.72 pci/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2024
-
- Collected
- Sep 12, 2019 13:00
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- 4422440
- Laboratory
- Eurofins Eaton Analytical South Bend in
- Monitoring period
- Jan 1, 2013 – Dec 31, 2021
-
Gross Alpha, Incl. Radon & U 4002 EPA method 7110B
- Result
- Not detected below 1.2 pci/l Minimum Reporting Level
-
- Collected
- Aug 21, 2019 13:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 190822-007TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 39.4 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
- 10.2 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 2.34 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950
- Result
- 51.9 ug/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2019
-
- Collected
- Aug 21, 2019 13:00
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 190822-007HA
- Laboratory
- MSDH Lab
-
Monochloroacetic Acid 2450 EPA method 552.2
- Result
- Not detected below 0.002 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dichloroacetic Acid 2451 EPA method 552.2
- Result
- 0.02 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.019 mg/l
- Monitoring period
- Not recorded
-
Monobromoacetic Acid 2453 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Dibromoacetic Acid 2454 EPA method 552.2
- Result
- Not detected below 0.001 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.04 mg/l
- Monitoring period
- Jan 1, 2019 – Dec 31, 2019
-
- Collected
- Apr 10, 2019 09:00
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 190411-006CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Apr 10, 2019 09:30
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- 190411-005CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.015 mg/l Minimum Reporting Level
-
- Collected
- Apr 8, 2019 10:45
- Sampling point
- TF103
- Sample type
- Routine
- Lab sample
- 190409-024IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.0023 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method 300.0
- Result
- 0.261 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
- Collected
- Apr 8, 2019 10:30
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 190409-023IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Barium 1010 EPA method 200.8
- Result
- 0.0023 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Fluoride 1025 EPA method 300.0
- Result
- 0.269 mg/l
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Nickel 1036 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
Selenium 1045 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2017 – Dec 31, 2019
Routine (10).