OSCAR-XO2 Wastewater Treatment System
Class I certified treatment by Lowridge Onsite Technologies — NSF/ANSI 40 rated, locally manufactured in Lake Stevens, WA.
Advanced On-Site Treatment, Made in Washington
The OSCAR-XO2 is a proprietary wastewater treatment system designed and manufactured by Lowridge Onsite Technologies in Lake Stevens, WA. It meets the NSF/ANSI 40 Class I standard — one of the highest performance benchmarks for residential on-site treatment systems.
The system combines a septic chamber, aeration zone, sand filter bed, and discharge tank into a continuous treatment process. The sand media on top naturally supports grass growth — making it an aesthetically clean solution for residential properties.
Healthy grass growing on the OSCAR-XO2 sand media bed — a sign of a well-functioning system.
How the OSCAR-XO2 Works
Four integrated treatment zones work together to process household wastewater to a Class I standard.
Septic Chamber
Incoming wastewater enters the septic chamber. Large solids settle and begin anaerobic breakdown. Contents appear dark brown with earthy odors — a sign of healthy operation.
Aeration Chamber
Wastewater is aerated using a recirculating pump and disc filter through the headworks. Oxygen-rich conditions promote aerobic microbial digestion of organic matter. Liquid may appear cloudy with a mild earthy smell.
Discharge Tank
Final treated effluent is collected in the discharge tank. Liquid should appear clear with a musty smell. Tank is pumped when 6 inches of settled bio-solids have accumulated.
Sand Filter Bed
Final treated effluent is collected in the discharge tank. Liquid should appear clear with a musty smell. Tank is pumped when 6 inches of settled bio-solids have accumulated.
System Specifications
System Owner's Do's and Don'ts
Do
- Practice water conservation
- Fix all leaking plumbing fixtures
- Maintain an active O&M contract with a certified service provider
- Divert roof drains and surface run-off away from the system
- Spread out laundry wash throughout the week
- Operate system within design capacity
- Call service provider in the event of any problem
- Delay the dishwasher on a timer
Don't
- Flush anything other than toilet paper and human waste
- Use septic tank additives, strong acids, or base solutions
- Drive vehicles over the system
- Tamper with control settings in the control panel
- Dump disinfectants, paint products, or non-cleaning agents down the drain
- Use a garbage disposal / grinder
- Dispose of unused medication into the system
- Use excessive body oils, sun tan lotions, or feminine products
OSCAR-XO2 Maintenance by Blackwater Services
Washington State requires all advanced treatment system owners to maintain an active O&M contract with a certified service provider — and it's required to keep your 2-year warranty valid. Blackwater Services handles all required inspections, pressure gauge monitoring, disc filter service, and reporting.
- Pressure gauge inspection (3-gauge headworks check)
- Disc filter cleaning when differential detected
- Solids accumulation measurement
- Alarm & red beacon testing
- Sand media surface inspection
- Discharge tank effluent quality check
- Pump & blower condition assessment
- State compliance reporting
Alarm Sounding?
If the alarm sounds or red beacon is illuminated, do not shut it off and ignore it. The alarm signals a discharge pump failure, pump tank overflow, or blower failure. Call Blackwater Services immediately.
Schedule Your OSCAR-XO2 Service
Call us to enroll in a maintenance plan or schedule your next inspection.
(425) 777-4545Manufacturer Support
Lowridge Onsite Technologies · Lake Stevens, WA
1-877-476-8823 · oscaronsite.com
OSCAR-XO2 FAQs
What is the OSCAR XO2 system?
The OSCAR-XO2 is a residential wastewater treatment system manufactured by Lowridge Onsite Technologies in Lake Stevens, WA. It meets the criteria for a Class I treatment unit under NSF/ANSI 40 protocol, producing high-quality treated effluent for on-site disposal.
How do I know my system is working properly?
Proper operation signs: no odor from the top of the aerator box, sand media supports grass with no visible sewage, discharge tank liquid is clear with a musty smell, pressure gauges 1 & 2 read ~50 psi with minimal differential, and gauge 3 reads 48–52 psi.
What does the alarm mean?
If the alarm sounds or the red beacon is illuminated, it indicates one of three problems: the discharge pump has failed, effluent is accumulating in the pump tank, or the blower has failed. Call your service provider immediately. Reference the data plate on the control panel door for contact information.
How often does the disc filter need to be cleaned?
If the pressure differential between gauges 1 and 2 in the headworks varies by 1–2 psi or more, the disc filter is plugging and must be manually cleaned. Your certified service technician handles this during routine inspections.
How often does the system need to be serviced?
Inspections begin 6 months after installation and occur every 6 months for the first two years (first 4 inspections are included in the purchase price). After the initial two years, annual inspections are required. An active O&M contract is required to maintain warranty coverage.
Does Blackwater Services maintain OSCAR XO2 systems?
Yes. Blackwater Services is a certified service provider for the OSCAR-XO2 system. We handle all required inspections, pressure gauge checks, disc filter cleaning, solids monitoring, alarm testing, and compliance reporting for homeowners in Snohomish and Skagit Counties.
Have an OSCAR-XO2 System?
Blackwater Services is your certified OSCAR-XO2 maintenance provider serving Snohomish and Skagit Counties. Call us to schedule service or enroll in a protection plan.
No obligation. Licensed & insured. Serving Snohomish, Skagit & Island Counties.
