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
MS0300011 , Chevron Usa
23 of the 53 analytes this system has been tested for have been detected at least once, across 485 samples on record.
The other 30 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 485 samples on record, detections range from September 22, 2003 to December 9, 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 | 149 of 150 results | Jun 29, 2004 | Sep 30, 2024 |
| TTHM 2950 | Organic Chemical | 130 of 130 results | Sep 13, 2004 | Dec 9, 2025 |
| Total Haloacetic Acids (Haa5) 2456 | Organic Chemical | 126 of 127 results | Oct 7, 2005 | Dec 9, 2025 |
| Chloroform 2941 | Organic Chemical | 87 of 87 results | Mar 14, 2007 | Dec 14, 2020 |
| Bromodichloromethane 2943 | Organic Chemical | 87 of 87 results | Mar 14, 2007 | Dec 14, 2020 |
| Dibromochloromethane 2944 | Organic Chemical | 87 of 87 results | Mar 14, 2007 | Dec 14, 2020 |
| Dichloroacetic Acid 2451 | Organic Chemical | 81 of 81 results | Mar 19, 2008 | Dec 14, 2020 |
| Trichloroacetic Acid 2452 | Organic Chemical | 81 of 81 results | Mar 19, 2008 | Dec 14, 2020 |
| Dibromoacetic Acid 2454 | Organic Chemical | 79 of 81 results | Mar 19, 2008 | Dec 14, 2020 |
| Lead 1030 | Inorganic Chemical | 59 of 150 results | Jun 29, 2004 | Sep 30, 2024 |
| Monochloroacetic Acid 2450 | Organic Chemical | 41 of 81 results | Mar 19, 2008 | Dec 14, 2020 |
| Bromoform 2942 | Organic Chemical | 39 of 87 results | May 2, 2007 | Aug 19, 2020 |
| Monobromoacetic Acid 2453 | Organic Chemical | 23 of 81 results | Oct 30, 2008 | Aug 19, 2020 |
| Barium 1010 | Inorganic Chemical | 15 of 15 results | Sep 22, 2003 | Feb 12, 2025 |
| Fluoride 1025 | Inorganic Chemical | 15 of 15 results | Sep 22, 2003 | Feb 12, 2025 |
| Arsenic 1005 | Inorganic Chemical | 10 of 15 results | Mar 16, 2005 | Feb 12, 2025 |
| Chromium 1020 | Inorganic Chemical | 10 of 15 results | Sep 22, 2003 | May 18, 2022 |
| Selenium 1045 | Inorganic Chemical | 6 of 15 results | Nov 15, 2004 | Feb 8, 2006 |
| Nickel 1036 | Inorganic Chemical | 2 of 15 results | May 12, 2010 | Nov 26, 2012 |
| Sulfate 1055 | Inorganic Chemical | 2 of 2 results | Sep 22, 2003 | Sep 22, 2003 |
| Sodium 1052 | Inorganic Chemical | 1 of 1 result | Mar 22, 2021 | Mar 22, 2021 |
| Thallium, Total 1085 | Inorganic Chemical | 1 of 15 results | May 12, 2010 | May 12, 2010 |
| Carbon Tetrachloride 2982 | Organic Chemical | 1 of 20 results | Jun 19, 2007 | Jun 19, 2007 |
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 411–420 of 485 samples, newest first — collected August 8, 2005 to September 21, 2006. The summary above covers all 485.
38 results from the 10 samples listed here: 12 detected, 26 not detected. Across the whole record it is 1,132 of 1,992. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.
Units in this table
TTHM is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 120.6 ug/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 Sep 21, 2006, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jul 1, 2006 – Sep 30, 2006 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jun 28, 2006, sampling point TF102 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jun 28, 2006, sampling point TF102 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 28, 2006, sampling point TF102 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jun 28, 2006, sampling point TF101 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jun 28, 2006, sampling point TF101 | Nitrate 1040 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jun 28, 2006, sampling point TF101 | Nitrite 1041 EPA method 353.2 | Jan 1, 2006 – Dec 31, 2006 |
|
||
| 0.00055 mg/l , sample collected Feb 8, 2006, sampling point TF101 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.067617 mg/l , sample collected Feb 8, 2006, sampling point TF101 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 1.174304 mg/l , sample collected Feb 8, 2006, sampling point TF101 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.0015 mg/l , sample collected Feb 8, 2006, sampling point TF101 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Uranium-238 4009 | Not recorded |
|
||
| 0.000637 mg/l , sample collected Feb 8, 2006, sampling point TF102 | Arsenic 1005 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.067626 mg/l , sample collected Feb 8, 2006, sampling point TF102 | Barium 1010 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Cadmium 1015 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 0.000672 mg/l , sample collected Feb 8, 2006, sampling point TF102 | Chromium 1020 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| 1.176455 mg/l , sample collected Feb 8, 2006, sampling point TF102 | Fluoride 1025 EPA method 380-75WE | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0002 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Mercury 1035 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Nickel 1036 EPA method 200.8 | Not recorded |
| 0.001431 mg/l , sample collected Feb 8, 2006, sampling point TF102 | Selenium 1045 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Antimony, Total 1074 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0001 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Beryllium, Total 1075 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Thallium, Total 1085 EPA method 200.8 | Jan 1, 2005 – Dec 31, 2007 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Uranium-238 4009 | Not recorded |
|
||
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF102 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
|
||
| Not detected below 0.005 mg/l Minimum Reporting Level , sample collected Feb 8, 2006, sampling point TF101 | Cyanide 1024 EPA method QC10204001X | Jan 1, 2005 – Dec 31, 2007 |
|
||
| 0.125 mg/l , sample collected Oct 7, 2005, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 | Oct 1, 2005 – Dec 31, 2005 |
|
||
| 160 ug/l , sample collected Oct 7, 2005, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Oct 1, 2005 – Dec 31, 2005 |
|
||
| Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Aug 8, 2005, sampling point TF102 | Nitrate-Nitrite 1038 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
| Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Aug 8, 2005, sampling point TF102 | Nitrate 1040 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
| Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Aug 8, 2005, sampling point TF102 | Nitrite 1041 EPA method 353.2 | Jan 1, 2005 – Dec 31, 2005 |
-
- Collected
- Sep 21, 2006
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 060922-001TH
- Laboratory
- MSDH Lab
- Monitoring period
- Jul 1, 2006 – Sep 30, 2006
-
TTHM 2950 EPA method 524.2
- Result
- 120.6 ug/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 28, 2006
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 060629-046NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
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
- Jun 28, 2006
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 060629-047NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2006 – Dec 31, 2006
-
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
- Feb 8, 2006
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 060209-044IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- 0.00055 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.067617 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 1.174304 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
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
- 0.0015 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
- Collected
- Feb 8, 2006
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 060209-045IN
- Laboratory
- MSDH Lab
-
Arsenic 1005 EPA method 200.8
- Result
- 0.000637 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Barium 1010 EPA method 200.8
- Result
- 0.067626 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cadmium 1015 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Chromium 1020 EPA method 200.8
- Result
- 0.000672 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Fluoride 1025 EPA method 380-75WE
- Result
- 1.176455 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Mercury 1035 EPA method 200.8
- Result
- Not detected below 0.0002 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
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
- 0.001431 mg/l
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Antimony, Total 1074 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Beryllium, Total 1075 EPA method 200.8
- Result
- Not detected below 0.0001 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Thallium, Total 1085 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Uranium-238 4009
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
- Monitoring period
- Not recorded
-
- Collected
- Feb 8, 2006
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 060209-019CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
-
- Collected
- Feb 8, 2006
- Sampling point
- TF101 Treatment Plant T101
- Sample type
- Routine
- Lab sample
- 060209-022CN
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2007
-
Cyanide 1024 EPA method QC10204001X
- Result
- Not detected below 0.005 mg/l Minimum Reporting Level
-
- Collected
- Oct 7, 2005
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 051108-001HA
- Laboratory
- MSDH Lab
- Monitoring period
- Oct 1, 2005 – Dec 31, 2005
-
Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
- Result
- 0.125 mg/l
-
- Collected
- Oct 7, 2005
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 051108-001TH
- Laboratory
- MSDH Lab
- Monitoring period
- Oct 1, 2005 – Dec 31, 2005
-
TTHM 2950 EPA method 524.2
- Result
- 160 ug/l
-
- Collected
- Aug 8, 2005
- Sampling point
- TF102 Treatment Plant T102
- Sample type
- Routine
- Lab sample
- 050809-118NI
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2005 – Dec 31, 2005
-
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
Routine (10).