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 341–350 of 485 samples, newest first — collected August 6, 2008 to September 18, 2008. The summary above covers all 485.
27 results from the 10 samples listed here: 20 detected, 7 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.
| Result | Analyte | Monitoring period |
|---|---|---|
|
||
| 65.2 ug/l , sample collected Sep 18, 2008, sampling point MRT000 | Chloroform 2941 EPA method 524.2 | Not recorded |
| Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 18, 2008, sampling point MRT000 | Bromoform 2942 EPA method 524.2 | Not recorded |
| 31.2 ug/l , sample collected Sep 18, 2008, sampling point MRT000 | Bromodichloromethane 2943 EPA method 524.2 | Not recorded |
| 11 ug/l , sample collected Sep 18, 2008, sampling point MRT000 | Dibromochloromethane 2944 EPA method 524.2 | Not recorded |
| 107.4 ug/l , sample collected Sep 18, 2008, sampling point MRT000 | TTHM 2950 EPA method 524.2 | Jul 1, 2008 – Sep 30, 2008 |
|
||
| Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Sep 18, 2008, sampling point MRT000 | Monochloroacetic Acid 2450 EPA method 552.2 | Not recorded |
| 0.015 mg/l , sample collected Sep 18, 2008, sampling point MRT000 | Dichloroacetic Acid 2451 EPA method 552.2 | Not recorded |
| 0.03 mg/l , sample collected Sep 18, 2008, sampling point MRT000 | Trichloroacetic Acid 2452 EPA method 552.2 | Not recorded |
| Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Sep 18, 2008, sampling point MRT000 | Monobromoacetic Acid 2453 EPA method 552.2 | Not recorded |
| 0.002 mg/l , sample collected Sep 18, 2008, sampling point MRT000 | Dibromoacetic Acid 2454 EPA method 552.2 | Not recorded |
| 0.04 mg/l , sample collected Sep 18, 2008, sampling point MRT000 | Total Haloacetic Acids (Haa5) 2456 | Jul 1, 2008 – Sep 30, 2008 |
|
||
| 0.0132 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.0076 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.0398 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| 0.0005 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.0491 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.0773 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.4787 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| 0.0044 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.2639 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| 0.0023 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
|
||
| 0.4064 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Copper, Free 1022 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
| 0.0022 mg/l , sample collected Aug 6, 2008, sampling point DS000 | Lead 1030 EPA method 200.8 | Jan 1, 2008 – Dec 31, 2008 |
-
- Collected
- Sep 18, 2008
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 080919-008TH
- Laboratory
- MSDH Lab
-
Chloroform 2941 EPA method 524.2
- Result
- 65.2 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
- 31.2 ug/l
- Monitoring period
- Not recorded
-
Dibromochloromethane 2944 EPA method 524.2
- Result
- 11 ug/l
- Monitoring period
- Not recorded
-
TTHM 2950 EPA method 524.2
- Result
- 107.4 ug/l
- Monitoring period
- Jul 1, 2008 – Sep 30, 2008
-
- Collected
- Sep 18, 2008
- Sampling point
- MRT000 Max. Res. Time
- Sample type
- Routine
- Lab sample
- 080919-017HA
- 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
- 0.015 mg/l
- Monitoring period
- Not recorded
-
Trichloroacetic Acid 2452 EPA method 552.2
- Result
- 0.03 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
- 0.002 mg/l
- Monitoring period
- Not recorded
-
Total Haloacetic Acids (Haa5) 2456
- Result
- 0.04 mg/l
- Monitoring period
- Jul 1, 2008 – Sep 30, 2008
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-041PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0132 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-040PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0076 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-039PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0398 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0005 mg/l
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-038PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0491 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-037PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.0773 mg/l
-
Lead 1030 EPA method 200.8
- Result
- Not detected below 0.0005 mg/l Minimum Reporting Level
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-036PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.4787 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0044 mg/l
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-035PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.2639 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0023 mg/l
-
- Collected
- Aug 6, 2008
- Sampling point
- DS000 Distribution
- Sample type
- Routine
- Lab sample
- 080807-034PB
- Laboratory
- MSDH Lab
- Monitoring period
- Jan 1, 2008 – Dec 31, 2008
-
Copper, Free 1022 EPA method 200.8
- Result
- 0.4064 mg/l
-
Lead 1030 EPA method 200.8
- Result
- 0.0022 mg/l
Routine (10).