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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.

Every analyte ever detected for Chevron Usa, with how many results found it and when it was first and last detected. Covers the whole record, not only 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 311–320 of 485 samples, newest first — collected June 30, 2009 to August 10, 2009. The summary above covers all 485.

57 results from the 10 samples listed here: 27 detected, 30 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.

Chemical and radiological sample results for Chevron Usa, every result from 311 to 320 of 485 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Aug 10, 2009
Sampling point
SM1 Utilities Control
Sample type
Routine
Lab sample
090811-013TH
Laboratory
MSDH Lab
40 ug/l , sample collected Aug 10, 2009, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 10, 2009, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
22.7 ug/l , sample collected Aug 10, 2009, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
9.44 ug/l , sample collected Aug 10, 2009, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
72.14 ug/l , sample collected Aug 10, 2009, sampling point SM1 TTHM 2950 EPA method 524.2 Not recorded
Collected
Aug 10, 2009
Sampling point
SM2 Shipping Maintenance
Sample type
Routine
Lab sample
090811-014HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 10, 2009, sampling point SM2 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.022 mg/l , sample collected Aug 10, 2009, sampling point SM2 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.034 mg/l , sample collected Aug 10, 2009, sampling point SM2 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Aug 10, 2009, sampling point SM2 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Aug 10, 2009, sampling point SM2 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.06 mg/l , sample collected Aug 10, 2009, sampling point SM2 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Aug 10, 2009
Sampling point
SM1 Utilities Control
Sample type
Routine
Lab sample
090811-013HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Aug 10, 2009, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.015 mg/l , sample collected Aug 10, 2009, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.025 mg/l , sample collected Aug 10, 2009, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.002 mg/l , sample collected Aug 10, 2009, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.003 mg/l , sample collected Aug 10, 2009, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.04 mg/l , sample collected Aug 10, 2009, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 Not recorded
Collected
Jul 21, 2009
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
090722-011HA
Laboratory
MSDH Lab
0.016 mg/l , sample collected Jul 21, 2009, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.018 mg/l , sample collected Jul 21, 2009, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.033 mg/l , sample collected Jul 21, 2009, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.016 mg/l , sample collected Jul 21, 2009, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
0.004 mg/l , sample collected Jul 21, 2009, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.08 mg/l , sample collected Jul 21, 2009, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jul 1, 2009 – Sep 30, 2009
Collected
Jul 21, 2009
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
090722-011TH
Laboratory
MSDH Lab
36.6 ug/l , sample collected Jul 21, 2009, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 21, 2009, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
22.6 ug/l , sample collected Jul 21, 2009, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
11.3 ug/l , sample collected Jul 21, 2009, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
70.5 ug/l , sample collected Jul 21, 2009, sampling point MRT000 TTHM 2950 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Collected
Jul 20, 2009
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
090721-002VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Benzene 2990 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Toluene 2991 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Jul 20, 2009, sampling point TF101 Styrene 2996 EPA method 524.2 Jul 1, 2009 – Sep 30, 2009
Collected
Jun 30, 2009
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
090701-061PB
Laboratory
MSDH Lab
0.0135 mg/l , sample collected Jun 30, 2009, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 30, 2009, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Collected
Jun 30, 2009
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
090701-062PB
Laboratory
MSDH Lab
0.0772 mg/l , sample collected Jun 30, 2009, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 30, 2009, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Collected
Jun 30, 2009
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
090701-060PB
Laboratory
MSDH Lab
0.0266 mg/l , sample collected Jun 30, 2009, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 30, 2009, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Collected
Jun 30, 2009
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
090701-059PB
Laboratory
MSDH Lab
0.0676 mg/l , sample collected Jun 30, 2009, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jun 30, 2009, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2009

Routine (10).