Water, Sewer & Septic
Water and Wastewater Treatment Design
Engineering for municipal and industrial water and wastewater treatment plants, package plants, upgrades and permits. Typical US fees run $50,000 to $1,000,000, and most projects take 6 months to several years. Our drawings, calculations and reports are sealed by a Professional Engineer (PE) licensed in the state where your project is located, ready for permit submission.

What the work involves
Engineers plan and design treatment processes, pumping, tanks, buildings and controls for drinking water and wastewater plants, plus package plants for developments and industrial pretreatment. Work usually starts with a facility plan, then design, permitting, funding applications such as State Revolving Fund loans, and construction phase services.
When you need it
- Plant nearing capacity or aging out
- New or tighter discharge permit limits
- Development needs a package treatment plant
- Industrial facility needs pretreatment
- Utility applying for state revolving fund financing
What you receive
- Facility or preliminary engineering report
- Design plans and specifications
- Permit documents
- Funding application support
- Construction administration
What drives the cost
Estimate. Fees scale with construction cost and commonly run to a substantial percentage of it on public projects; small package plants are at the low end.
Frequently asked questions
How much does water and Wastewater Treatment Design cost?
Across the US, water and Wastewater Treatment Design usually costs $50,000 to $1,000,000. Estimate. Fees scale with construction cost and commonly run to a substantial percentage of it on public projects; small package plants are at the low end.
How long does water and Wastewater Treatment Design take?
Plan on 6 months to several years from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Do I need a licensed PE for water and Wastewater Treatment Design?
In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.
Will I also need a environmental engineer?
Sometimes. Depending on the site, water and Wastewater Treatment Design can also involve a environmental engineer, electrical engineer, structural engineer or operator. We tell you up front which other professionals your project needs and coordinate with them so the drawings agree.
Who do you provide water and Wastewater Treatment Design for?
Most of our clients for this service are municipalitys, developers and business owners. Describe your project and one of our engineers will reply with scope, fee and schedule.
How are municipal treatment projects funded?
Commonly through utility rates, bonds, and low-interest loans from Clean Water and Drinking Water State Revolving Funds administered by the states with EPA support. Engineers often prepare the planning documents these programs require.
What is a package plant?
A prefabricated, compact treatment plant often used for small communities, campgrounds or developments beyond sewer service. It still requires a discharge permit and a licensed operator.
Who issues wastewater discharge permits?
NPDES permits are issued by EPA or by states authorized to run the program. Permit limits drive treatment design.
How long do plant upgrades take?
Planning, design, permitting and construction often take several years for municipal facilities. Funding cycles and permit schedules often set the pace.