Wastewater Treatment Engineering & Design Resources
NOWRA
- Recommended Guidance for the Design of Wastewater Drip Dispersal Systems (PDF)
- NOWRA Standard of Practice: Decentralized Wastewater Treatment – Soil-Based Treatment System “Selection and Design” (DOC)
- A Homeowner's Onsite System Guide and Record Keeping Folder (PDF)
US Environmental Protection Agency (EPA)
- EPA Decentralized Wastewater Home Page
- Onsite Wastewater Treatment and Disposal Systems Manual (PDF) - This manual provides supplemental and new information for wastewater treatment professionals in the public and private sectors, expanding upon the design manual listed below.
- Design Manual: Onsite Wastewater Treatment and Disposal Systems (PDF) - This design manual provides technical information for those involved in the design, construction, operation, maintenance and regulation of onsite wastewater treatment and disposal systems. It does not contain standards for those systems, nor does it contain pertinent rules or regulations
- EPA's Class V Well Program
- EPA Region 1 Innovative Technology Inventory
- Source Water Protection Practices Bulletin: Managing Septic Systems to Prevent Contamination of Drinking Water
- Industrial Wastewater Treatment Technology Database
Technology Fact Sheets:
- Aerobic Treatment (PDF)
- Evapotransportation (PDF)
- Low Pressure Pipe Systems (PDF)
- Mound Systems (PDF)
- Septage Treatment/Disposal (PDF)
- Septic System Tanks (PDF)
- Septic Tank Effluent Screens (PDF)
- Septic Tank Leaching Chamber (PDF)
- Septic Tank Systems for Large Flow Application (PDF)
- Septic Tank-Soil Absorption Systems (PDF)
- Small Diameter Gravity Sewer (PDF)
- Types of Filters (PDF)
- Control Panels (PDF)
- Recirculating Sand Filters (PDF)
- Septic Tank Polishing (PDF)
Wastewater Technology Fact Sheets:
- Disinfection for Small Systems (PDF)
- Free Water Surface Wetlands (PDF)
- High-Efficiency Toilets (PDF)
- Intermittent Sand Filters (PDF)
- Ozone Disinfection (PDF)
- Package Plants (PDF)
- Sewers, Pressure (PDF)
- Ultraviolet Disinfection (PDF)
- Wetlands: Subsurface Flow (PDF)
Water Efficiency Technology Fact Sheets:
- Composting Toilets (PDF)
- Incinerating Toilets (PDF)
- Oil Recirculating Toilets (PDF)
Water Environment Research Foundation (WERF)
- Qualitative Tools to Determine the Expected Performance of Wastewater Soil Treatment Units
- Performance and Costs for Decentralized Unit Processes
- Performance Dynamics of Trace Organic Chemicals in Onsite Treatment Units and Systems
- Development of Design Criteria for Denitrifying Treatment Wetlands
- Nitrogen Removal and Sustainability of Vertical Flow Constructed Wetlands for Small-Scale Wastewater Treatment: Recommendations for Improvements
- Influent Constituent Characteristics of the Modern Waste Stream from Single Sources
- State of the Science: Review of Quantitative Tools to Determine Wastewater Soil Treatment Unit Performance
- Hydrologic Bioretention Performance and Design Criteria for Cold Climates
- Factors Affecting the Performance of Primary Treatment in Decentralized Wastewater Systems
- Guidance for Evaluation of Potential Groundwater Mounding Associated with Cluster and High-Density Wastewater Soil Absorption System
- Organic Wastewater Compounds, Pharmaceuticals, and Coliphage in Groundwater Receiving Discharge From Onsite Wastewater Treatment Systems Near La Pine, Oregon: Occurrence and Implications for Transport
- Micro-Scale Evaluation of Phosphorus Management: Alternative Wastewater Systems Evaluation
- Performance of Engineered Treatment Units and Their Effects on Biozone Formation in Soil and System Purification Efficiency
- Decentralized Wastewater System Reliability Analysis Handbook