Average Salt Content (mg per Liter) SEASONAL SALT CONTENT IN A BALTIMORE STREAM Population Density (people per square mile): ______________________ Name: _____________ Class: _____________ Date: ______________ 200 300 400 500 600 700 800 900 100 1900 2000 1800 1700 1600 1500 1300 1400 1100 1200 1000 Spring Summer Fall Winter 2005 2006 2007 2008 2009 2010 100 mg/ L: Maximum Salt Content allowed in NYC Drinking Water 1000 mg/L: Kills some freshwater fish 250 mg/ L: Maximum salt content allowed by EPA, tastes salty Average Salt Content (mg per Liter) Type of Stream: Forest Stream Suburban Stream Urban Stream

Average Salt Content (mg per Liter) ANNUAL SALT CONTENT IN A BALTIMORE STREAM Population Density (people per square mile): ______________________ Name: _____________ Class: _____________ Date: ______________ 200 300 400 500 600 700 800 900 100 1900 2000 1800 1700 1600 1500 1300 1400 1100 1200 1000 Type of Stream: Forest Stream Suburban Stream Urban Stream Average Salt Content (mg per Liter) 1000 mg/L: Kills some freshwater fish 250 mg/ L: Maximum salt content allowed by EPA, tastes salty 100 mg/ L: Maximum Salt Content allowed in NYC Drinking Water 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009