With the goal of protecting human health and the environment, the Environmental Protection Agency (EPA) enforces federal clean and safe drinking water laws that provide support for municipal wastewater treatment plants, and takes part in pollution prevention efforts aimed at protecting watersheds and sources of drinking water. The Clean Water Act (CWA) enacted in 1942, and significantly reorganized and expanded in 1972, puts forward a system to regulate direct and indirect discharges of pollutants in the “waters of the United States,” with the intent to restore and maintain the chemical, physical and biological integrity of the nation’s waters.
The Safe Drinking Water Act (SDWA) passed in 1974, and amended in 1986 and 1996, authorizes and permits the EPA to set national standards for drinking water contaminants. The National Pollutant Discharge Elimination System (NPDES) permit program, created in 1972 by the Clean Water Act (CWA), helps address water pollution by regulating point sources that discharge pollutants to the waters of the United States. The Water Quality Standards Regulation (40 CFR 131) establishes requirements for states and tribes to review, revise and adopt water quality standards.
Many small businesses, especially manufacturing, are subject to federal, state or local NPDES or stormwater regulations. In some cases, businesses can file for exemptions, so it is important to understand what regulations apply to your business. Small business can contact their state SBEAPs for free and confidential assistance.
Water quality regulations and resources
NPDES provides guidance to municipalities and state and federal permitting authorities on how to meet stormwater pollution control goals in as flexible and cost-effective manner as possible.
- NPDES: Stormwater Program
- Construction Stormwater Compliance
- Industrial Stormwater Compliance
- Municipal Stormwater Compliance
- Does Your Facility Need A Stormwater Permit
- 2021 Multi-Sector General Permit (MSGP) – effective March 1, 2021
- Stormwater Factsheets for Different Sectors
- National Menu of Stormwater Best Management Practices and Good Housekeeping
- Stormwater Maintenance
- Stormwater Pollution Prevention Plan (SWPPP)
- Stormwater Pollution Prevention Plan: A Guide for Industrial Operators
The NPDES program issues permits to all wastewater dischargers, and offers treatment to establish specific discharge limits, monitoring and reporting requirements.
Animal Feeding Operations
Any facility that currently has capacity, or is proposing to have capacity, that meets or exceeds any one of the federal, large, confined-animal feeding operation (CAFO) thresholds is a point source, as defined by the Clean Water Act (CWA), and may be regulated under the NPDES permitting program.
General NPDES Resources
- NPDES Training Courses and Workshops –for permit writers, dischargers and others
- View NPDES Individual and General Permits
- Find an NPDES Permit in Your State
- Find Water Quality Information in Your State/Territory/ Tribe
- Sanitary Sewer Overflow (SSO) Additional Resources
- Combined Sewer Overflows (CSOs)
- Water Quality Standards and the Water Quality-based Approach to Pollution Control