These chapters, as Kelli reminded me, should be listed by installation date, not colonization date. Please PM me if you see any mistakes!
Active chapters:
Alpha (1899) - Eastern Michigan University
Beta (1905) - Central Michigan University
Delta (1946) - Indiana University of Pennsylvania
Zeta (1921) - Lock Haven University of Pennsylvania
Omicron (1930) - Concord University
Rho (1932) - Southeastern Oklahoma State University
Upsilon (1935) - University of Central Arkansas
Phi (1940) - Southeastern Louisiana University
Chi (1940) - Shepherd University
Psi (1944) - James Madison University
Alpha Gamma (1946) - Henderson State University
Alpha Epsilon (1948) - Western Illinois University
Alpha Lambda (1953) - Radford University
Alpha Mu (1962) - University of Arkansas - Monticello
Alpha Xi (1965) - Mansfield University of Pennsylvania
Alpha Omicron (1966) - Clarion University of Pennsylvania
Alpha Pi (1966) - Slippery Rock University of Pennsylvania
Alpha Tau (1968) - Edinboro University of Pennsylvania
Alpha Phi (1969) - West Chester University of Pennsylvania
Beta Delta (1971) - Duquesne University
Beta Eta (1972) - Southern Illinois University
Beta Theta (1976) - St. Mary's University
Beta Iota (1976) - Millersville University of Pennsylvania
Beta Nu (1979) - Bloomsburg University
Beta Mu (1978) - Salisbury University
Beta Xi (1980) - Michigan Technological University
Beta Pi (1982) - Eastern Illinois University
Beta Upsilon (1971) - Shippensburg University of Pennsylvania
Beta Upsilon (1983) - New Jersey Institute of Technology
(whoops some mistake here^ will check later)
Beta Phi (1983) - California University of Pennsylvania
Beta Chi (1985) - Ferris State University
Beta Omega (1998) - Monmouth University
Gamma Gamma (1987) - University of West Alabama
Gamma Delta (1987) - University of Massachusetts - Dartmouth
Gamma Epsilon (1988) - State University of New York - Potsdam
Gamma Zeta (1988) - Frostburg State University
Gamma Theta (1989) - Penn State - Erie
Gamma Iota (1990) - York College of Pennsylvania
Gamma Lambda (1990) - Kutztown University of Pennsylvania
Gamma Mu (1990) - West Virginia Institute of Technology
Gamma Xi (1991) - Grand Valley State University
Gamma Pi (1991) - Lycoming College
Gamma Rho (1992) - Seton Hall University
Gamma Tau (1992) - Lebanon Valley College
Gamma Upsilon (1993) - California State University, Los Angeles
Gamma Phi (2001) - Merrimack College
Gamma Chi (1990) - William Patterson University
Gamma Psi (2004) - Fitchburg State College
Gamma Omega (1993) - LaSalle University
Delta Alpha (1993) - Gannon University
Delta Beta (1993) - Fairmont State College
Delta Delta (1995) - University of Illinois at Chicago
Delta Epsilon (1994) - Marist College
Delta Zeta (1995) - East Stroudsburg University of Pennsylvania
Delta Eta (1997) - Belmont University
Delta Theta (1997) - Moravian College
Delta Iota (1997) - Johnson & Wales University
Delta Lambda (1998) - Siena Heights University
Delta Mu (1998) - Cumberland University
Delta Nu (1999) - Beloit College
Delta Omicron (1999) - North Carolina Wesleyan College
Delta Pi (2000) - Oglethorpe University
Delta Rho (2000) - Chowan College
Delta Sigma (2000) - University of the Sciences
Delta Tau (2001) - Oakland University
Delta Upsilon (2002) - St. Leo University
Delta Phi (2004) - New York University
Delta Chi (2005) - Christian Brothers University
Delta Psi (2004) - Johnson & Wales University
Delta Omega (to be installed fall 2005) - Penn State - Altoona
Epsilon Alpha (2004) - Embry-Riddle Aeronautical University
Epsilon Beta (to be installed fall 2005) - University of Texas Pan-American
Epsilon Gamma (2005) - Armstrong Atlantic State University
Epsilon Delta (to be installed fall 2005) - Rogers State University
Zeta Tau (1935) - Longwood University
Inactive chapters:
Gamma (1909) - University of Wisconsin
Eta (1927) - Kent State University
Theta (1923) - Wayne State University
Iota (1923) - Emporia State University
Kappa (1924) - Miami University
Lambda (1919) - Temple University
Nu (1928) - University of Northern Colorado
Xi (1929) - Western State College
Pi (1930) - Harris Teachers College
Omega (1945) - Minot State College
Alpha Alpha (1945) - Ball State University
Alpha Beta (1946) - Mashall University
Alpha Delta (1948) - Southwest Missouri State University
Alpha Zeta (1958) - State University of New York - Queens College
Alpha Eta (1959) - Alma College
Alpha Theta (1959) - University of Detroit
Alpha Iota (1960) Syracuse University
Alpha Kappa (1960) - Marietta College
Alpha Nu (1962) - Central Missouri State University
Alpha Rho (1968) - Youngstown State University
Alpha Sigma (1968) - Northeast Missouri State University
Alpha Upsilon (1969) - Bryant College
Alpha Chi (1969) - Northeastern University
Alpha Psi Colony (1969) - University of Northern Iowa
Alpha Omega (1960) - Brooklyn College
Beta Zeta (1970) - University of Alabama at Birmingham
Beta Kappa Colony (1977) - American International College
Beta Lambda (1979) - University of Texas at San Antonio
Beta Omicron Colony (1980) - University of Wisconsin at Green Bay
Beta Rho (1983) - Arkansas Technological University
Beta Sigma Colony (1982) - Northeast Oklahoma State University
Beta Psi (1984) - Saint Louis University
Gamma Alpha (1985) - University of Rio Grande
Gamma Beta (1987) - Lake Superior State College
Gamma Eta (1990) - Northwood University
Gamma Kappa Colony (1990) - Averett College
Gamma Nu (1991) - Waynesburg College
Gamma Omicron Colony (1991) - Cameron University
Gamma Sigma (1992) - Belmont Abbey College
Delta Gamma Colony (Closed 1995) - Pembroke State University
Delta Kappa Colony (Pledged 1997) - Nicholls State University
Delta Xi Colony (Closed 2000) - Valparaiso University
Thanks, Teena, Summer, and Kelli!