Associations & Foundations:
- American Water Works Association (AWWA)
- Canadian Association on Water Quality (CAWQ)
- Canadian Water and Wastewater Association (CWWA)
- International Ozone Association (IOA)
- International Water Association (IWA)
- Ontario Water Works Association (OWWA)
- Water Research Foundation (WRF)
- WateReuse
Canadian/Ontario Government
- Environment and Climate Change Canada
- Ministry of the Environment (Reports, Manuals and Guidelines)
- Summary of Guidelines for Canadian Drinking Water Quality
United States/International:
- Australian Drinking Water Guidelines
- USEPA Contaminant Candidate List 3 - CCL 3
- USEPA Contaminant Candidate List 4 - CCL 4
- USEPA Drinking Water Contaminants – Standards and Regulations
- USEPA Fourth Unregulated Contaminant Monitoring Rule (UCMR) 2017-2021
- USEPA Ground Water Rule
- USEPA Guidance for Data Quality Assessment
- USEPA Guidance Manuals for the Surface Water Treatment Rules
- USEPA Lead and Copper Rule
- USEPA Long Term 2 Enhanced Surface Water Treatment Rule
- USEPA Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) – January 2006
- USEPA Revised Total Coliform Rule And Total Coliform Rule (RTCR)
- USEPA Stage 1 and Stage 2 Disinfectants and Disinfection Byproducts Rules (DDBP)
- USEPA Table of Regulated Drinking Water Contaminants
- World Health Organization (WHO)