Water Environment Federation – www.wef.org
American Waterworks Association – www.awwa.org
ESOP Association – www.esopassociation.org
Hawaii Water Environment Association – www.HWEA.org
Hawaii American Waterworks Association – www.awwa-hi.org
Wastewater Operator Certification – www.hawaii.gov/wastewater
Water Operator Certification – www.hawaii.gov/health/environmental/water/sdwb
