MS4 Permits – Explained

You’ve heard the term “MS4 Permit”. But do you know what it means?

Each state within the USA has its own regulations relating to storm water management. California has, for twenty years, regulated the runoff and treatment of stormwater in its industrial and municipal sources. Urban storm water in California is considered to be a primary impairment source for ten percent of all local rivers, lakes and reservoirs, and almost twenty percent of all estuaries (source: 2010 Integrated Report). This is high considering only six percent of all California’s land mass is urbanized.