Tag Archives: MS4

Maryland and Virginia Release New Stormwater Permits

In late December, the Maryland Department of the Environment released three new municipal separate storm sewer system (MS4) permits for the state’s most populous areas: Baltimore, Baltimore County, and Prince George’s County. A permit for Anne Arundel County is expected soon. The stringent new stormwater permits are based on the District of Columbia’s permit and [...]

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Residual Designated Authority – Friend or Foe to the Public Sector?

Residual Designated Authority, a little known Clean Water Act provision, could address existing unregulated discharges and improve equitable cost distribution among dischargers. Yet there may be unintended consequences.

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Air Force Petition Questions Retention Standard and Other Aspects of Stormwater Permit

The Air Force is challenging the ability of the U.S. Environmental Protection (EPA) to require strict stormwater retention requirements for runoff and seeks to clarify the EPA’s mandate to reduce pollutant discharges to the maximum extent practicable. The Buckley Air Force Base’s Municipal Separate Storm Sewer System (MS4) Permit requires the Air Force to reduce [...]

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California Court Rules That MS4 Permit Requirements Are Federal Mandates

In mid-October, a California appeals court ruled in affirmation with a state trial court that stormwater permit requirements are federal mandates not subject to state reimbursement. The case involved Los Angeles County’s Municipal Separate Storm Sewer System Permit (MS4), which requires the county to reduce discharged pollution by the maximum extent practicable. The permit adopted [...]

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Public Review Begins on Revised Draft Stormwater Permit for 60 N.H. Municipalities

Public comment is now open on New Hampshire’s Municipal Separate Storm Sewer System (MS4) permit, which applies to 60 of the state’s communities. The U.S. Environmental Protection Agency estimates that complying with the six minimum control measures will cost municipalities between $78,000 and $829,000 per year. This new permit is an update to the state’s [...]

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American Rivers Releases Guide for Integrating Green Infrastructure Into Stormwater Permits

On Jan. 17, American Rivers announced new guidance — Permitting Green Infrastructure: A Guide to Improving Municipal Stormwater Permits and Protecting Water Quality. The guide is designed for community and watershed advocates, and examines the elements and regulatory language of successful stormwater permits from across the U.S. It also includes resources that can help watershed [...]

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WEF Stormwater Webcasts Now Available

The Water Environment Federation (WEF; Alexandria, Va.) webcast Meeting the New Public Education Requirements of the Stormwater (MS4) Permit is now available on WEF’s YouTube Channel in nine 10-minute segments. The series, consisting of content from a WEF webcast held May 4, presents information designed to help small to mid‐size municipalities meet the newly required public education [...]

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