Top 73 Water treatment Jobs in St. Louis, Mo

Assistant Chemical Tester
Ameren —St. Louis, MO
- $53.76 an hour
- Full-time
- Customer service
- Word processing
- Bachelor of Science
12d
Water Treatment Plant Operator
City of St. Louis —St. Louis, MO
- $54,860 - $78,416 a year
- Overtime
- Engineering
- Mid-level
- Residential
Treatment Plant Operator Senior County Plant
Metropolitan St. Louis Sewer District —St. Louis, MO
- Full-time
- Pass drug screening
- Mid-level
- High school diploma or GED
Superintendent, Field Operations
American Water —Olivette, MO
- Full-time
- Customer service
- Maintenance
- Office
- Health insurance
Account Manager - Water Treatment
Hydrite —St. Louis, MO
- Engineering
- English
- Mid-level
- Profit sharing
- Health insurance
Quick Apply
Military Service - Air Force Reserve, Water & Fuel Systems Maintenance
Military Service - Air Force Reserve —St. Louis, MO
- From $50,000 a year
- Part-time
- Military
- Mid-level
- High school diploma or GED
- Health insurance
- Tuition reimbursement
Service Technician - Water Treatment
Absolute Water Technologies —Arnold, MO
- Full-time
- Clean driving record
- Customer service
- Pass drug screening
- Profit sharing
- Wellness program
Quick Apply
Regulatory Case Analyst
Central States Water Resources —St. Louis, MO
- Microsoft Excel
- Microsoft Outlook
- Mid-level
Quick Apply
12d
Service Supervisor
Absolute Water Technologies —Arnold, MO
- Full-time
- Clean driving record
- Microsoft Excel
- Bachelor of Science
- Profit sharing
- Wellness program
Quick Apply
Water Treatment Plant Supervisor I
City of St. Louis —St. Louis, MO
- $57,642 - $86,450 a year
- Full-time
- Writing skills
- Mid-level
- Residential
Sales Representative - Water Treatment & Industrial Chemicals
Hawkins Inc —Dupo, IL
- $90,000 - $120,000 a year
- Microsoft Excel
- Microsoft Outlook
- Ability to climb stairs
- Employee stock purchase plan
- Paid holidays
Quick Apply
Product Applications Manager – Water Treatment
Hydrite —St. Louis, MO
- Remote
- Clean driving record
- Word processing
- English
- Profit sharing
- Health insurance
Quick Apply
Instrumentation & Controls Technician
Central States Water Resources —St. Louis, MO
- $37 an hour
- On call
- 5 years
- Word processing
- High school diploma or GED
- Disability insurance
- Health insurance
Quick Apply
Regional Training & Operations Technician
Water Technologies —St. Louis, MO
- Nights as needed
- Writing skills
- Mid-level
- 3 years
- Health savings account
- AD&D insurance
Quick Apply
Director, Water Quality & Environmental Compliance
American Water —Belleville, IL
- $128,540 - $204,860 a year
- Full-time
- 5 years
- Business development
- Driver's License
- Employee stock purchase plan
- Health insurance
Wastewater Collection & Treatment Group Lead
GBA Companies —Chesterfield, MO
- Full-time
- Ability to walk for extended periods
- Travel
- Ability to sit for extended periods
- Paid holidays
- Disability insurance
Quick Apply
Office Manager
Packard Culligan Water —Belleville, IL
- $57,000 - $62,000 a year
- Full-time
- Dealership
- Mid-level
- Residential
- Wellness program
- Paid holidays
Quick Apply
Associate, Project Delivery Engineer
American Water —St. Louis, MO
- Full-time
- Office
- Analysis skills
- Driver's License
- Health insurance
Water Distribution Supervisor
City of St. Louis —St. Louis, MO
- $57,642 - $86,450 a year
- Overtime
- Residential
- Driver's License
- Military encouraged
Associate, Construction Engineer
American Water —St. Louis, MO
- Full-time
- System design
- Office
- Analysis skills
- Health insurance

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water treatment jobs near st. louis, mo

Assistant Chemical Tester

Ameren -
St. Louis, MO

Apply Now

Job Details

Full-time
$53.76 an hour
12 days ago

Qualifications

Passenger vehicle
Customer service
Respirator

Full Job Description

About Ameren Missouri

Ameren Missouri has been providing electric and gas service for more than 100 years, and our electric rates are among the lowest in the nation. Ameren Missouri's mission is to power the quality of life for our 1.2 million electric and 132,000 natural gas customers in central and eastern Missouri. Our service area covers 64 counties and more than 500 communities including the greater St. Louis area

Description of Duties
Under direct but not constant supervision, perform or assist in performing special and standard chemical analyses and experiments on oil, water, coal, and other materials; determine the need for appropriate chemical treatment of waters; and perform other related work as required. Operate and troubleshoot water production equipment such as clarifiers, filters, ultrafiltration units, reverse osmosis units, and demineralizers. Operate and maintain online analytical instrumentation associated with feedwater and boiler water analysis. Troubleshoot issues pertaining to abnormal feedwater and boiler water chemistry.

Position Requirements

Education: B.S. or B.A. degree in Chemistry or Chemical Engineering from an accredited college or university required. Applicants meeting the prerequisite chemistry curriculum below may also be considered.

College Algebra – 3 semester hours

General Chemistry I – 4 semester hours

General Chemistry II with Qualitative Analysis – 4 semester hours

Organic Chemistry – 3 semester hours

Quantitative Analysis – 3 semester hours

Instrumental Analysis – 3 semester hours

Experience: Previous experience in water treatment and power plant chemistry is preferred; however, candidates without this experience will be considered. Proficiency with PC-based spreadsheets, graphics, word processing, and database software is desirable.

Other Requirements:

Successful candidate will be required to join Operating Engineers Local 148.
Successful candidate will be required to enter and successfully complete the company training program (approximately one year in length).
Must maintain a 70% grade average during each session of the training program. Failure to maintain this average may result in disqualification from the position.
Applicant must pass the EEI TECH test.
Applicant must be able to meet the essential functions of the Chemical Tester classification with or without reasonable accommodation.
Applicant must demonstrate normal color vision.
Must be able to operate an automobile.
Must be able to wear a respirator.
Excellent analytical, communication, human relations, leadership, and customer service skills required.
Must be able to multi-task in a laboratory environment.

Working Conditions:

Work performed in laboratory settings, energy centers, power plant environments, and outdoor locations.
Exposure to dust, fumes, hazardous chemicals, and heat.

Hourly Pay:

Grade Step OA 052 Step 1 of 2 - 53.01 USD

Grade Step OA 052 Step 2 of 2 (Top Step) - 53.76 USD

Position is eligible for annual incentive payments based on company performance and subject to sole management discretion. Visit our Benefits & Perks Page for more information on benefits provided to regular full-time employees.

If end date is listed, the posting will come down at 12:00 am on that date:

Thursday July 30, 2026

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, ethnicity, age, disability, genetic information, military service or status, pregnancy, marital status, sexual orientation, gender identity or expression, or any other class, trait, or status protected by law.

Apply Now

Refine Your Search

water treatment jobs in st. louis, mo

Assistant Chemical Tester

Water Treatment Plant Operator

Treatment Plant Operator Senior County Plant

Superintendent, Field Operations

Account Manager - Water Treatment

Military Service - Air Force Reserve, Water & Fuel Systems Maintenance

Service Technician - Water Treatment

Regulatory Case Analyst

Service Supervisor

Water Treatment Plant Supervisor I

Sales Representative - Water Treatment & Industrial Chemicals

Product Applications Manager – Water Treatment

Instrumentation & Controls Technician

Regional Training & Operations Technician

Director, Water Quality & Environmental Compliance

Wastewater Collection & Treatment Group Lead

Office Manager

Associate, Project Delivery Engineer

Water Distribution Supervisor

Associate, Construction Engineer

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