Most people think of pressure washing as a simple cleaning service: water in, dirty surface out. What they don't think about is where the dirty water goes. When a pressure washer blasts a parking lot, a fleet vehicle, or a commercial kitchen exhaust hood, the resulting wastewater contains detergents, oils, heavy metals, bacteria, and whatever was on the surface being cleaned. That water has to go somewhere, and where it goes matters: legally, environmentally, and financially for the contractor or business owner responsible for the work.
Water reclamation in pressure washing (the practice of capturing, containing, and properly disposing of pressure washing wastewater rather than allowing it to flow into storm drains) is both an environmental responsibility and, for many applications, a legal requirement. Understanding the regulatory framework, the practical reclamation methods, and the specific requirements in Georgia helps contractors avoid violations and helps property owners choose compliant service providers.
The Clean Water Act: The Foundational Requirement
The legal framework for pressure washing wastewater management traces back to the federal Clean Water Act (CWA), specifically the National Pollutant Discharge Elimination System (NPDES) permit program. The CWA prohibits discharging pollutants into navigable waters of the United States without an NPDES permit. This prohibition extends, critically, to discharges into storm drains, because storm drains are typically connected directly to streams, rivers, and other surface waters without treatment.
The key phrase for pressure washing is this: storm drains are not sewers. Sanitary sewers carry wastewater to a treatment plant, where pollutants are removed before discharge. Storm drains carry runoff directly to waterways, typically untreated. Washing wastewater into a storm drain is legally equivalent to washing it directly into the creek the drain discharges to.
The EPA's NPDES stormwater rules apply to both construction sites and commercial activities. For pressure washing specifically, EPA guidance distinguishes between washing activities that can be considered non-stormwater discharges (permitted if certain conditions are met) and those that are clearly prohibited. Discharges of pressure washing water containing detergents, oils, or other contaminants into storm drains are not covered by any standard permit exemption.
Georgia EPD Requirements
In Georgia, the Environmental Protection Division (EPD) administers the NPDES program under authority delegated from EPA. Georgia's General NPDES Permits and stormwater rules establish state-specific requirements that overlay the federal baseline.
Georgia's MS4 (Municipal Separate Storm Sewer System) permits, which cover stormwater management in urban areas including metro Atlanta, explicitly prohibit non-stormwater discharges to MS4s. These prohibited discharges include:
- Wastewater from pressure washing activities containing soaps, detergents, degreasers, or other chemicals
- Vehicle washing wastewater
- Pool draining and filter backwash
- Food service wastewater (including grease trap cleaning runoff)
Atlanta, DeKalb County, Gwinnett County, Fulton County, Cobb County, and other MS4 permit holders in the metro area are required to enforce these prohibitions within their jurisdictions and can issue violations to contractors or businesses whose activities result in prohibited discharges.
Enforcement runs through warning notices, compliance orders, civil penalties and referral to the Georgia Environmental Protection Division. This page publishes no penalty figure, and the reason is worth more to a property manager than the number would be. Three separate instruments can reach the same bucket of dirty water, and they carry different amounts. The federal figures sit in the Clean Water Act at Section 309, which sets civil and criminal penalties on separate tracks and adjusts them for inflation (United States Environmental Protection Agency, Clean Water Act enforcement, read 2026-09-02). Georgia sets its own civil penalty by statute under the Georgia Water Quality Control Act at O.C.G.A. Section 12-5-52 (Georgia Code, Title 12, Chapter 5, Article 2, read 2026-09-04). A county or city then runs a third instrument: Gwinnett County's Illicit Discharge and Illegal Connection Ordinance, Chapter 100, carries its own maximum, and Section 100-21(e) confines that ordinance to unincorporated Gwinnett, so an incorporated city inside the same county is running a different one again (Gwinnett County Water Quality Protection Guideline 1, Surface Cleaning, read 2026-09-03).
The practical consequence: a single per-day dollar figure quoted for pressure washing runoff, with no statute named beside it, is almost always the wrong instrument. The most repeated example in this trade attaches a Georgia state figure to the federal Clean Water Act, where it does not appear. Ask which instrument, then ask which enforcement track within it.
Applications Requiring Reclamation
Not all pressure washing generates wastewater of equal concern. The pollutant load in wastewater varies dramatically by the surface being cleaned and the materials used. Here's a practical breakdown of which applications carry the most regulatory and environmental significance:
Fleet Washing and Vehicle Washing
Vehicle washing wastewater contains petroleum hydrocarbons (oil, grease), heavy metals (from brake dust, exhaust residue, and metal surfaces), detergents, and suspended solids. This is among the highest-concern pressure washing applications from an environmental standpoint, and it's the one most actively regulated. Any commercial vehicle washing operation, whether at a dedicated facility or in the field, must prevent wastewater from reaching storm drains.
Commercial truck washes and bus maintenance facilities are typically required to have engineered treatment systems (API oil-water separators, clarifiers, or recirculation systems) as part of their facility permits. Field fleet washing, washing vehicles at a customer's location, generates the same pollutants but in a mobile context, making reclamation equipment and practices the control mechanism.
Parking Lot Cleaning
Parking lots accumulate oil drips, fuel spills, tire debris, brake dust, and heavy metals from vehicle traffic. The first flush from a parking lot during rain is one of the most pollutant-concentrated stormwater discharges in the urban environment. Pressure washing a parking lot mobilizes concentrated loads of all these materials and, if they flow uncaptured to a storm drain, discharges them directly to surface water.
For commercial property managers who maintain parking lots, this is a significant compliance consideration. Contracts with pressure washing vendors should require documentation of wastewater reclamation practices.
Kitchen Exhaust and Grease Cleaning
Pressure washing of restaurant kitchen exhaust hoods, ducts, and rooftop grease traps generates wastewater with extremely high grease and oil content: enough to create visible sheen and biological oxygen demand in any water body it enters. This is one of the most commonly cited violations because kitchen cleaning often happens at night, grease trap overflow runs across rooftops to drain edges, and it's highly visible to inspectors.
Residential House Washing
Standard residential house washing with biodegradable detergent generates wastewater of lower concern than the industrial applications above, but sodium hypochlorite (bleach) in soft washing solutions is a regulated substance in higher concentrations and can affect aquatic organisms. Best practice for residential washing is to allow wastewater to percolate into landscaping rather than routing it to storm drains, and to use minimum effective chemical concentrations.
Water Reclamation Equipment
The practical solution to pressure washing wastewater compliance is reclamation equipment: systems that capture, contain, and either treat or properly dispose of washing wastewater. The main equipment types are:
Containment Berms and Sump Systems
Portable containment berms, inflatable or folding barriers that create a contained work area around the surface being cleaned, prevent wastewater from spreading beyond the work zone. The contained water is then vacuumed up by a reclaim system or wet/dry vacuum for disposal. Berms are commonly used for vehicle washing on impervious surfaces and for spot cleaning in areas where drainage control is needed.
Vacuum Reclaim Systems
Reclaim vacuums use squeegees, mop-up booms, or vacuum wands to collect wastewater from the work surface. The collected water is pumped to a storage tank on the service vehicle for later proper disposal. This is the standard approach for parking lot cleaning and mobile fleet washing. Combined pressure-wash-and-reclaim units integrate the pressure washer, reclaim vacuum, and waste storage in a single trailer or truck body.
Reclaim system capacity and efficiency varies. High-production units can reclaim 80 to 95 percent of applied water in ideal conditions (smooth, level surfaces). Rough or cracked surfaces, high slope, and wind reduce reclaim efficiency.
Storm Drain Protection
For situations where complete reclaim isn't practical, storm drain inserts or plugs block the inlet to prevent wastewater entry during cleaning. Drain covers or inflatable bladder plugs are deployed before work begins and remain in place until the area is cleaned and remaining water has been vacuumed up. This is a backup system, not a substitute for trying to minimize wastewater runoff, but provides a critical last line of defense.
Filtration and Treatment Systems
More sophisticated operations use on-board filtration (typically oil-water separators, activated carbon filters, and clarifier tanks) that treat reclaimed water to a level where it can be legally discharged to sanitary sewer. This requires a sewer discharge permit (typically from the local water authority), a process that involves demonstrating treatment system performance and paying applicable sewer fees.
Water recirculation systems, which treat reclaimed water to a standard that allows it to be reused in the pressure washer, eliminate the disposal question entirely for closed-loop operations. These are used primarily in high-volume fleet washing operations where the economics of water treatment justify the equipment investment.
Proper Wastewater Disposal
Collected pressure washing wastewater must be disposed of properly. Acceptable disposal options in Georgia include:
- Sanitary sewer discharge: With permission from the local sewer authority (typically a municipal or county water and sewer utility), reclaimed wastewater can be discharged to the sanitary sewer system at an approved access point. This requires a discharge authorization and compliance with the utility's pretreatment standards.
- Licensed wastewater treatment facility: Collected wastewater can be hauled to a licensed waste treatment facility. This requires transportation in a properly labeled and permitted vehicle and manifesting for certain waste categories.
- Infiltration into vegetated areas: For low-pollutant-load wastewater (biodegradable cleaning solutions, no petroleum contamination), allowing wastewater to percolate into established turf or landscaping, away from storm drains and surface water, is generally acceptable for residential applications. This is not appropriate for petroleum-contaminated or heavily chemically loaded wastewater.
Disposal to the sanitary sewer is the practical option for most commercial reclaim operations. Establishing a discharge authorization with Atlanta's Department of Watershed Management, DeKalb County Watershed Management, or the relevant county water authority is a one-time administrative task that legitimizes ongoing sewer disposal.
Documentation and Compliance Programs
For contractors working on commercial, government, or institutional properties, maintaining documentation of reclamation practices is increasingly expected. Commercial property managers, government agencies, and corporate real estate teams want to know that their service contractors are compliant: both to avoid liability for violations that occur on their property and as part of their own sustainability and ESG reporting.
Useful documentation practices for pressure washing contractors include:
- Site visit logs noting reclamation method used, chemical products and concentrations, and wastewater disposal method
- Photo documentation of reclaim setup before and during cleaning
- Waste disposal receipts or sewer discharge authorization on file
- Safety Data Sheets (SDS) for all cleaning chemicals used, available for inspection
At Thrare Contracting, we operate with environmental compliance as a standard of practice, not an afterthought. Our commercial pressure washing services use appropriate reclamation methods for the application, and we provide documentation of our practices for clients who need it for their own compliance reporting. Contact us to discuss your commercial cleaning project.