2.1 Federal Water-Pollution History and Stormwater Phases

Historical Evolution of Federal Water Pollution Law

For a Certified Erosion, Sediment and StormWater Inspector (CESSWI), every field inspection, deficiency log, and corrective action timeframe traces its legal authority to a layered framework of federal, state, and local statutes. Understanding how federal water pollution law evolved explains why construction runoff is regulated as a point-source discharge rather than unmanaged overland drainage.

1899 Rivers and Harbors Act (The Refuse Act)

The earliest federal statute used to curb water pollution was the Rivers and Harbors Appropriations Act of 1899. Section 13 of that statute—commonly known as the Refuse Act—prohibited the dumping of refuse, filth, industrial debris, or excavated solids into navigable waters of the United States (or onto their banks where material could wash into navigable channels) without a permit from the U.S. Army Corps of Engineers (USACE). Although progressive for its era, the 1899 Act was enacted primarily to protect commercial maritime navigation from physical shoaling and channel obstruction rather than to protect aquatic ecosystems, drinking water supplies, or recreational water quality.

1948 Federal Water Pollution Control Act (FWPCA)

Congress passed the original Federal Water Pollution Control Act (FWPCA) in 1948 as the first statute expressly addressing water quality and public health. However, the 1948 law treated water pollution as a purely local responsibility: it provided modest federal research grants and low-interest loans for municipal sewage treatment plants while leaving standards and enforcement almost entirely to individual states. Federal enforcement could occur only when pollution originating in one state endangered the health or welfare of citizens in another state, and only after protracted multi-year conferences and consent from the polluting state's authorities.

1972 Clean Water Act (CWA) Amendments

By the late 1960s, accelerating industrial growth and suburban land development overwhelmed state-only oversight—dramatized nationally when oil- and chemical-soaked debris on Ohio's Cuyahoga River caught fire in June 1969. In response, Congress enacted the sweeping Federal Water Pollution Control Act Amendments of 1972 (Public Law 92-500, codified at 33 U.S.C. § 1251 et seq.), universally known as the Clean Water Act (CWA).

Section 101(a) of the 1972 CWA established a bold statutory objective: to restore and maintain the chemical, physical, and biological integrity of the Nation's waters. To achieve that mandate, Congress set two landmark national goals:

1. An interim goal of achieving water quality that provides for the protection and propagation of fish, shellfish, and wildlife and provides for recreation in and on the water ("fishable and swimmable" waters) by July 1, 1983.
2. A national goal that the discharge of pollutants into navigable waters be eliminated by 1985, accompanied by an immediate prohibition on the discharge of toxic pollutants in toxic amounts.

The 1972 amendments replaced fragmented state nuisance standards with a dual federal-state regulatory system combining technology-based effluent limitations for every point source with water quality-based standards tailored to the designated uses of each receiving waterbody.

1987 Water Quality Act (WQA) and the Two-Phase Stormwater Program

During the first fifteen years of the CWA, the U.S. Environmental Protection Agency (EPA) focused primarily on continuous "end-of-pipe" discharges from factories and municipal Publicly Owned Treatment Works (POTWs). Nationwide water quality assessments in the mid-1980s revealed, however, that storm-driven runoff from urban streets, industrial yards, and land-disturbing construction sites remained a leading cause of surface water impairment.

In 1987, Congress passed the Water Quality Act (WQA) (Public Law 100-4), adding Section 402(p) to the Clean Water Act. Section 402(p) directed EPA to bring municipal, industrial, and construction stormwater discharges into the National Pollutant Discharge Elimination System (NPDES) permitting program through two distinct regulatory phases:

• Phase I Stormwater Program (Promulgated November 16, 1990): Required NPDES permit coverage for (1) large construction activities disturbing 5 acres or more of land (or less than 5 acres if part of a larger common plan of development or sale disturbing $\ge 5$ acres), (2) 11 categories of industrial activity, and (3) medium and large Municipal Separate Storm Sewer Systems (MS4s) serving populations of 100,000 or more.
• Phase II Stormwater Program (Promulgated December 8, 1999; permits effective March 2003): Expanded NPDES permitting to cover (1) small construction activities disturbing 1 acre or more and less than 5 acres of land, or less than 1 acre if part of a larger common plan of development or sale that will ultimately disturb $\ge 1$ acre, and (2) small MS4s located within Census urban areas with at least 50,000 people (or areas separately designated by the permitting authority) as well as designated non-traditional MS4s (such as state departments of transportation, public universities, and military installations).