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 121–130 of 485 samples, newest first — collected November 19, 2019 to May 27, 2020. The summary above covers all 485.

52 results from the 10 samples listed here: 43 detected, 9 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 121 to 130 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 May 27, 2020 13:30 Sampling point SM2 Shipping Maintenance Sample type Routine Lab sample 200528-002TH Laboratory MSDH Lab
18.5 ug/l , sample collected May 27, 2020 13:30, sampling point SM2	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 27, 2020 13:30, sampling point SM2	Bromoform 2942 EPA method 524.2	Not recorded
6.3 ug/l , sample collected May 27, 2020 13:30, sampling point SM2	Bromodichloromethane 2943 EPA method 524.2	Not recorded
1.99 ug/l , sample collected May 27, 2020 13:30, sampling point SM2	Dibromochloromethane 2944 EPA method 524.2	Not recorded
26.8 ug/l , sample collected May 27, 2020 13:30, sampling point SM2	TTHM 2950	Apr 1, 2020 – Jun 30, 2020
Collected May 27, 2020 14:00 Sampling point SM1 Utilities Control Sample type Routine Lab sample 200528-001TH Laboratory MSDH Lab
15.8 ug/l , sample collected May 27, 2020 14:00, sampling point SM1	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 27, 2020 14:00, sampling point SM1	Bromoform 2942 EPA method 524.2	Not recorded
5.86 ug/l , sample collected May 27, 2020 14:00, sampling point SM1	Bromodichloromethane 2943 EPA method 524.2	Not recorded
1.74 ug/l , sample collected May 27, 2020 14:00, sampling point SM1	Dibromochloromethane 2944 EPA method 524.2	Not recorded
23.4 ug/l , sample collected May 27, 2020 14:00, sampling point SM1	TTHM 2950	Apr 1, 2020 – Jun 30, 2020
Collected Feb 26, 2020 13:00 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample 200227-022NI Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 26, 2020 13:00, sampling point TF101	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2020 – Dec 31, 2020
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 26, 2020 13:00, sampling point TF101	Nitrate 1040 EPA method QC10107041C	Jan 1, 2020 – Dec 31, 2020
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 26, 2020 13:00, sampling point TF101	Nitrite 1041 EPA method QC10107041C	Jan 1, 2020 – Dec 31, 2020
Collected Feb 4, 2020 12:30 Sampling point SM1 Utilities Control Sample type Routine Lab sample 200205-001HA Laboratory MSDH Lab
0.008 mg/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
0.008 mg/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
0.005 mg/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
0.002 mg/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
0.001 mg/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
0.024 mg/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Total Haloacetic Acids (Haa5) 2456	Jan 1, 2020 – Mar 31, 2020
Collected Feb 4, 2020 13:00 Sampling point SM2 Shipping Maintenance Sample type Routine Lab sample 200205-002HA Laboratory MSDH Lab
0.004 mg/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
0.014 mg/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
0.009 mg/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
0.001 mg/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
0.002 mg/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
0.03 mg/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Total Haloacetic Acids (Haa5) 2456	Jan 1, 2020 – Mar 31, 2020
Collected Feb 4, 2020 13:00 Sampling point SM2 Shipping Maintenance Sample type Routine Lab sample 200205-002TH Laboratory MSDH Lab
20 ug/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 4, 2020 13:00, sampling point SM2	Bromoform 2942 EPA method 524.2	Not recorded
8.45 ug/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Bromodichloromethane 2943 EPA method 524.2	Not recorded
4.38 ug/l , sample collected Feb 4, 2020 13:00, sampling point SM2	Dibromochloromethane 2944 EPA method 524.2	Not recorded
33 ug/l , sample collected Feb 4, 2020 13:00, sampling point SM2	TTHM 2950	Jan 1, 2020 – Mar 31, 2020
Collected Feb 4, 2020 12:30 Sampling point SM1 Utilities Control Sample type Routine Lab sample 200205-001TH Laboratory MSDH Lab
21.9 ug/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Chloroform 2941 EPA method 524.2	Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Feb 4, 2020 12:30, sampling point SM1	Bromoform 2942 EPA method 524.2	Not recorded
7.96 ug/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Bromodichloromethane 2943 EPA method 524.2	Not recorded
3.86 ug/l , sample collected Feb 4, 2020 12:30, sampling point SM1	Dibromochloromethane 2944 EPA method 524.2	Not recorded
33.7 ug/l , sample collected Feb 4, 2020 12:30, sampling point SM1	TTHM 2950	Jan 1, 2020 – Mar 31, 2020
Collected Nov 20, 2019 12:30 Sampling point SM1 Utilities Control Sample type Routine Lab sample 191121-006HA Laboratory MSDH Lab
0.002 mg/l , sample collected Nov 20, 2019 12:30, sampling point SM1	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
0.016 mg/l , sample collected Nov 20, 2019 12:30, sampling point SM1	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
0.02 mg/l , sample collected Nov 20, 2019 12:30, sampling point SM1	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Nov 20, 2019 12:30, sampling point SM1	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
0.005 mg/l , sample collected Nov 20, 2019 12:30, sampling point SM1	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
0.04 mg/l , sample collected Nov 20, 2019 12:30, sampling point SM1	Total Haloacetic Acids (Haa5) 2456	Oct 1, 2019 – Dec 31, 2019
Collected Nov 20, 2019 13:00 Sampling point SM2 Shipping Maintenance Sample type Routine Lab sample 191121-005HA Laboratory MSDH Lab
0.002 mg/l , sample collected Nov 20, 2019 13:00, sampling point SM2	Monochloroacetic Acid 2450 EPA method 552.2	Not recorded
0.02 mg/l , sample collected Nov 20, 2019 13:00, sampling point SM2	Dichloroacetic Acid 2451 EPA method 552.2	Not recorded
0.025 mg/l , sample collected Nov 20, 2019 13:00, sampling point SM2	Trichloroacetic Acid 2452 EPA method 552.2	Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Nov 20, 2019 13:00, sampling point SM2	Monobromoacetic Acid 2453 EPA method 552.2	Not recorded
0.006 mg/l , sample collected Nov 20, 2019 13:00, sampling point SM2	Dibromoacetic Acid 2454 EPA method 552.2	Not recorded
0.05 mg/l , sample collected Nov 20, 2019 13:00, sampling point SM2	Total Haloacetic Acids (Haa5) 2456	Oct 1, 2019 – Dec 31, 2019
Collected Nov 19, 2019 13:00 Sampling point SM2 Shipping Maintenance Sample type Routine Lab sample 191121-006TH Laboratory MSDH Lab
37 ug/l , sample collected Nov 19, 2019 13:00, sampling point SM2	Chloroform 2941 EPA method 524.2	Not recorded
1.1 ug/l , sample collected Nov 19, 2019 13:00, sampling point SM2	Bromoform 2942 EPA method 524.2	Not recorded
22.8 ug/l , sample collected Nov 19, 2019 13:00, sampling point SM2	Bromodichloromethane 2943 EPA method 524.2	Not recorded
13.3 ug/l , sample collected Nov 19, 2019 13:00, sampling point SM2	Dibromochloromethane 2944 EPA method 524.2	Not recorded
74 ug/l , sample collected Nov 19, 2019 13:00, sampling point SM2	TTHM 2950	Oct 1, 2019 – Dec 31, 2019

Collected
May 27, 2020 13:30

Sampling point
SM2 Shipping Maintenance

Sample type
Routine

Lab sample
200528-002TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  18.5 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
  6.3 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  1.99 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  26.8 ug/l
  
  Monitoring period
  Apr 1, 2020 – Jun 30, 2020
Collected
May 27, 2020 14:00

Sampling point
SM1 Utilities Control

Sample type
Routine

Lab sample
200528-001TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  15.8 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
  5.86 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  1.74 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  23.4 ug/l
  
  Monitoring period
  Apr 1, 2020 – Jun 30, 2020
Collected
Feb 26, 2020 13:00

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
200227-022NI

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2020 – Dec 31, 2020
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Feb 4, 2020 12:30

Sampling point
SM1 Utilities Control

Sample type
Routine

Lab sample
200205-001HA

Laboratory
MSDH Lab
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  0.008 mg/l
  
  Monitoring period
  Not recorded
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  0.008 mg/l
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  0.005 mg/l
  
  Monitoring period
  Not recorded
- Monobromoacetic Acid 2453 EPA method 552.2
  
  Result
  0.002 mg/l
  
  Monitoring period
  Not recorded
- Dibromoacetic Acid 2454 EPA method 552.2
  
  Result
  0.001 mg/l
  
  Monitoring period
  Not recorded
- Total Haloacetic Acids (Haa5) 2456
  
  Result
  0.024 mg/l
  
  Monitoring period
  Jan 1, 2020 – Mar 31, 2020
Collected
Feb 4, 2020 13:00

Sampling point
SM2 Shipping Maintenance

Sample type
Routine

Lab sample
200205-002HA

Laboratory
MSDH Lab
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  0.004 mg/l
  
  Monitoring period
  Not recorded
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  0.014 mg/l
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  0.009 mg/l
  
  Monitoring period
  Not recorded
- Monobromoacetic Acid 2453 EPA method 552.2
  
  Result
  0.001 mg/l
  
  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
  0.03 mg/l
  
  Monitoring period
  Jan 1, 2020 – Mar 31, 2020
Collected
Feb 4, 2020 13:00

Sampling point
SM2 Shipping Maintenance

Sample type
Routine

Lab sample
200205-002TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  20 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
  8.45 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  4.38 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  33 ug/l
  
  Monitoring period
  Jan 1, 2020 – Mar 31, 2020
Collected
Feb 4, 2020 12:30

Sampling point
SM1 Utilities Control

Sample type
Routine

Lab sample
200205-001TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  21.9 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
  7.96 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  3.86 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  33.7 ug/l
  
  Monitoring period
  Jan 1, 2020 – Mar 31, 2020
Collected
Nov 20, 2019 12:30

Sampling point
SM1 Utilities Control

Sample type
Routine

Lab sample
191121-006HA

Laboratory
MSDH Lab
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  0.002 mg/l
  
  Monitoring period
  Not recorded
- Dichloroacetic Acid 2451 EPA method 552.2
  
  Result
  0.016 mg/l
  
  Monitoring period
  Not recorded
- Trichloroacetic Acid 2452 EPA method 552.2
  
  Result
  0.02 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
  0.005 mg/l
  
  Monitoring period
  Not recorded
- Total Haloacetic Acids (Haa5) 2456
  
  Result
  0.04 mg/l
  
  Monitoring period
  Oct 1, 2019 – Dec 31, 2019
Collected
Nov 20, 2019 13:00

Sampling point
SM2 Shipping Maintenance

Sample type
Routine

Lab sample
191121-005HA

Laboratory
MSDH Lab
- Monochloroacetic Acid 2450 EPA method 552.2
  
  Result
  0.002 mg/l
  
  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
  0.025 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
  0.006 mg/l
  
  Monitoring period
  Not recorded
- Total Haloacetic Acids (Haa5) 2456
  
  Result
  0.05 mg/l
  
  Monitoring period
  Oct 1, 2019 – Dec 31, 2019
Collected
Nov 19, 2019 13:00

Sampling point
SM2 Shipping Maintenance

Sample type
Routine

Lab sample
191121-006TH

Laboratory
MSDH Lab
- Chloroform 2941 EPA method 524.2
  
  Result
  37 ug/l
  
  Monitoring period
  Not recorded
- Bromoform 2942 EPA method 524.2
  
  Result
  1.1 ug/l
  
  Monitoring period
  Not recorded
- Bromodichloromethane 2943 EPA method 524.2
  
  Result
  22.8 ug/l
  
  Monitoring period
  Not recorded
- Dibromochloromethane 2944 EPA method 524.2
  
  Result
  13.3 ug/l
  
  Monitoring period
  Not recorded
- TTHM 2950
  
  Result
  74 ug/l
  
  Monitoring period
  Oct 1, 2019 – Dec 31, 2019

Routine (10).