Affiliated Companies:
Wallis Concrete, Inc.: Concrete tanks, lift stations, control buildings

WALCON, Inc.: Modular restroom, laundry, shower and concession buildings

Water and wastewater products and information:
Water and Wastewater.com

Water Online

Wastewater Technology Fact Sheets:
USEPA Municipal Wastewater Technology Fact Sheets

State Regulatory Agency

USA Watershed Search

U.S. EPA Onsite Wastewater Treatment Systems Manual, 2002:
Estimating Wastewater Flows

Biological Phosphorus Removal:
Wisconsin Dept of Natural Resources

Nitrogen Removal Training:
New York Dept of Environmental Conservation

Evaluation of UV radiation Disinfection Technologies
for Wastewater Treatment Plant Effluent:
New York State Energy Research and Development Authority

Wastewater Operator Information:
Pennsylvania Department of Environmental Protection

Water Environment Federation

Wastewater Management:
U.S. Environmental Protection Agency

Guidelines for Water Reuse:
U.S. Environmental Protection Agency