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California / Toxic Substances Control / Hazardous Substances Engineer

Job-title file

Hazardous Substances Engineer

Design, analyze, and oversee technical systems or infrastructure, ensuring they meet specifications and codes.

135 employees hold this title in Toxic Substances Control. Median total compensation for the role is $110,456, above the department median of $102,059.

Employees
135
Total payroll
$14.2M
Role median
$110,456
Agency median
$102,059
Comparison
Above

What the records show

Role pay distribution

Pay distribution for this role

-$4,596$149,638+

Hover a bar for its range; click to filter the list below.

How total compensation varies among the 135 people in this role. Even for one job title, pay differs with seniority, step, overtime, and tenure. Each bar is a pay range; the far-right bar collects the highest earners.

Compared with the local labor market

Hazardous Substances Engineer pay vs. California

Across all employers in California, the median wage for Environmental Engineers — about 4,550 people — is $130,410. Toxic Substances Control pays a median base salary of $112,965 for this role, 13% below that figureabout the 37th percentile of local pay for the occupation.

Where Toxic Substances Control sits in the local pay range

10th
25th
Median
75th
90th
$79,790
$95,950
$130,410
$148,650
$170,790
Toxic Substances Control median · $112,965

The bar is the range of annual wages for Environmental Engineers across every employer in California, from the 10th to the 90th percentile, with the middle 50% highlighted. The marker shows Toxic Substances Control’s median base salary for this role. Both figures are base pay only.

And across the country

Nationwide, the median wage for Environmental Engineers — about 38,340 people — is $107,110. Toxic Substances Control’s median base salary is 5% above that national figure, about the 55th percentile of pay for the occupation nationally.

10th
25th
Median
75th
90th
$69,990
$83,570
$107,110
$134,420
$162,220
Toxic Substances Control median · $112,965

Local and national wages differ for reasons beyond how well a job pays — cost of living, the mix of employers, and local demand for the occupation all move the California range relative to the national one.

Computed over the 124 of 135 people in this role paid at least $25,000in base salary. The rest are part-year or part-time records, whose actual pay isn’t comparable to a full-time annual wage.

Median total compensation for this role at Toxic Substances Control is $110,456, which includes overtime and employer-paid benefits. The benchmark above excludes both, so total compensation is deliberately not compared against it.

Benchmark: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (May 2025). BLS Occupational Employment and Wage Statistics (OEWS) covers all employers in the area — private, non-profit, and government alike — so this is a comparison against the whole local labor market for the occupation, not against private-sector pay. OEWS wages are straight-time pay and exclude overtime, shift differentials, and employer-paid benefits, so the government figure shown here is base pay on the same basis. Total compensation is not comparable to it. Job titles are matched to the closest standard occupation, so the comparison is between similar work rather than an identical job classification.

Compare departments

This role across California

Hazardous Substances Engineer is held in 2 California departments. In Toxic Substances Control, the median of $110,456 ranks #1 of 2.

Highest-paying departments for this role

Median total compensation for the Hazardous Substances Engineer role in other Californiadepartments (highest first). Each bar links to that department’s page for this role.

Record list

Employees with this title

Page 1

Nicole Yuen

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$126,326
Base pay
$125,976
Overtime
$0
Other pay
$350
Benefits
$0
Total compensation
$126,326
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Alameda
Middle name
G

Source-specific fields

Base Pay
$10,817
Cs/csu
Cs
Position Number
8105123726002
Salary Total
$10,742
Total Pay
$126,326

Nicole Yuen is a Hazardous Substances Engineer at Toxic Substances Control. They work full-time. 2025 total compensation came to $126,326. They are represented by R09.

Nancy Cardona

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$125,937
Base pay
$125,548
Overtime
$0
Other pay
$389
Benefits
$0
Total compensation
$125,937
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Los Angeles
Middle name
L

Source-specific fields

Base Pay
$11,131
Cs/csu
Cs
Position Number
8105183726001
Salary Total
$10,797
Total Pay
$125,937

Nancy Cardona is a Hazardous Substances Engineer at Toxic Substances Control. They work full-time. 2025 total compensation came to $125,937. Union affiliation: R09.

Mera Choi

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$123,723
Base pay
$123,548
Overtime
$0
Other pay
$175
Benefits
$0
Total compensation
$123,723
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Sacramento
Middle name
S

Source-specific fields

Base Pay
$10,823
Cs/csu
Cs
Position Number
8105113726057
Salary Total
$10,498
Total Pay
$123,723

Mera Choi is a Hazardous Substances Engineer at Toxic Substances Control. They work full-time. 2025 total compensation came to $123,723. They are represented by R09.

Michael Howley

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$123,616
Base pay
$123,441
Overtime
$0
Other pay
$175
Benefits
$0
Total compensation
$123,616
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Alameda
Middle name
J

Source-specific fields

Base Pay
$10,814
Cs/csu
Cs
Position Number
8105123726020
Salary Total
$10,490
Total Pay
$123,616

Michael Howley holds the role of Hazardous Substances Engineer at Toxic Substances Control. Their status is full-time. In 2025, their total compensation was $123,616. Union affiliation: R09.

Aslam Ahmed Shareef

Hazardous Substances Engineer/Toxic Substances Control

2023 total comp
$123,537
Base pay
$122,937
Overtime
$0
Other pay
$600
Benefits
$0
Total compensation
$123,537
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Orange

Source-specific fields

Base Pay
$10,595
Cs/csu
Cs
Position Number
8105043726010
Salary Total
$10,807
Total Pay
$123,537

At Toxic Substances Control, Aslam Ahmed Shareef serves as a Hazardous Substances Engineer. They work full-time. Their 2023 pay totaled $123,537. They are represented by R09.

Kenneth Gath

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$122,719
Base pay
$122,219
Overtime
$0
Other pay
$500
Benefits
$0
Total compensation
$122,719
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Sacramento
Middle name
J

Source-specific fields

Base Pay
$10,707
Cs/csu
Cs
Position Number
8105113726208
Salary Total
$10,386
Total Pay
$122,719

Kenneth Gath is a Hazardous Substances Engineer at Toxic Substances Control. They work full-time. 2025 total compensation came to $122,719. They are represented by R09.

Connor Shingai

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$122,604
Base pay
$122,254
Overtime
$0
Other pay
$350
Benefits
$0
Total compensation
$122,604
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Alameda
Middle name
I

Source-specific fields

Base Pay
$10,447
Cs/csu
Cs
Position Number
8101723726003
Salary Total
$10,384
Total Pay
$122,604

Connor Shingai holds the role of Hazardous Substances Engineer at Toxic Substances Control. Their status is full-time. In 2025, their total compensation was $122,604. Their bargaining unit is R09.

Letitia Shen

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$121,720
Base pay
$121,370
Overtime
$0
Other pay
$350
Benefits
$0
Total compensation
$121,720
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Sacramento
Middle name
M

Source-specific fields

Base Pay
$11,131
Cs/csu
Cs
Position Number
8105913726206
Salary Total
$10,797
Total Pay
$121,720

Letitia Shen works as a Hazardous Substances Engineer for Toxic Substances Control. Their status is full-time. Letitia earned $121,720 in 2025. Union affiliation: R09.

Fue Xiong

Hazardous Substances Engineer/Toxic Substances Control

2025 total comp
$121,250
Base pay
$121,075
Overtime
$0
Other pay
$175
Benefits
$0
Total compensation
$121,250
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Sacramento

Source-specific fields

Base Pay
$10,826
Cs/csu
Cs
Position Number
8105313726901
Salary Total
$10,501
Total Pay
$121,250

Fue Xiong is a Hazardous Substances Engineer at Toxic Substances Control. They work full-time. 2025 total compensation came to $121,250. Union affiliation: R09.

Armo Hayrabidian

Hazardous Substances Engineer/Toxic Substances Control

2024 total comp
$119,591
Base pay
$119,116
Overtime
$0
Other pay
$475
Benefits
$0
Total compensation
$119,591
Employment type
Full-Time
Union / bargaining unit
R09
Work county
Los Angeles

Source-specific fields

Base Pay
$10,499
Cs/csu
Cs
Position Number
8106533726170
Salary Total
$10,499
Total Pay
$119,591

Armo Hayrabidian holds the role of Hazardous Substances Engineer at Toxic Substances Control. Their status is full-time. In 2024, their total compensation was $119,591. They are represented by R09.