Micrograms Per Liter

The biologically-based 1-hour average flow event which occurs, on average, once every 3 years.

The lowest 1-day average flow that occurs, on average, once every 10 years.

The lowest 30-day average flow that occurs, on average, once every 10 years.

The lowest 30-day average flow that occurs, on average, once every 5 years.

The biologically-based 4-day average flow event which occurs on average, once every 3 years.

The lowest 7-day average flow that occurs, on average, once every 10 years.

Average Monthly Limitations

Assessment and Total Maximum Daily Load Tracking and Implementation System

Average Weekly Limitations

Better Assessment Science Integrating Point & Nonpoint Sources

Best Available Control Technology Economically Achievable

Best Conventional Pollutant Control Technology

Biological Nutrient Removal

5-Day Biochemical Oxygen Demand

Best Professional Judgment

Best Practicable Control Technology Currently Available

Concentrated Animal Feeding Operation

Chemical Abstracts Service Number

Carbonaceous Biochemical Oxygen Demand

Effluent pollutant concentration (for purposes of steady-state mass-balance equation)

Code of Federal Regulations

Cubic Feet Per Second

Resultant in-stream pollutant concentration, after discharge (for purposes of steady-state mass-balance equation)

Background in-stream pollutant concentration (for purposes of steady-state mass-balance equation)

Coefficient of Variation

Clean Water Act

Dilution Factor (For Purposes of Steady-State Mass-Balance Equation)

Discharge Monitoring Report

Dissolved Oxygen

Environmental Fluid Dynamics Code Model

Environmental Protection Agency

Fraction of effluent flow withdrawn from receiving water (for purposes of Wisconsin's phosphorus steady-state mass-balance equation)

Formazin Nephelometric Unit

Hayden Area Regional Sewer Board

Hydrological Simulation Program-Fortran Model

Hydrologic Unit Code

Iowa Administrative Code

Integrated Compliance Information System

Idaho Department of Environmental Quality

Idaho Administrative Code

Load Allocation

Long-Term Average

Maximum Daily Limitation

Mitsubishi Electric Research Laboratories Model

Milligrams Per Liter

Million Gallons Per Day

Margin of Safety

Model Selection Decision Tool

New York State Department of Environmental Conservation

Nutrient Modeling Toolbox

Nitrogen and Phosphorus Pollution Data Access Tool

National Pollutant Discharge Elimination System

New Source Performance Standards

Operation and Maintenance

Ohio Environmental Protection Agency

Portable Document Format

Publicly Owned Treatment Works

Effluent flow in mgd or cfs (for purposes of steady-state mass-balance equation)

Stream flow in mgd or cfs above the point of discharge (for purposes of steady-state mass-balance equation)

Rhode Island Department of Environmental Management

Reasonable Potential Analysis

Spatially-Referenced Regression On Watershed Attributes

EPA Storage and Retrieval Database

Technology-Based Effluent Limitation

Total Kjeldahl Nitrogen

Total Maximum Daily Load

Total Nitrogen

Total Phosphorus

Technical Support Document for Water Quality-Based Toxics Control

Total Suspended Solids

Upper Blackstone Water Pollution Abatement District

United States Environmental Protection Agency

United States Geological Survey

Watershed Analysis Risk Management Framework Model

Water Quality Analysis Simulation Program Model

Watershed Assessment, Tracking, & Environmental Results System

Water Environment and Reuse Foundation

Wisconsin Department of Natural Resources

Wasteload allocation

Water Quality-Based Effluent Limitation

Water Quality Criterion

Water Quality Standard

Wastewater Treatment Facility

Wastewater Treatment Plant

Year to Date