Designation Criteria and Initial Listing of MS4 Entities

The State of Indiana completed the Designation Criteria and Initial Listing of MS4 Entities in early 2001. Initially designated MS4 entities were mailed a notification letter in June, July or August of 2001.

The initial designation was made with the understanding that additional MS4 entities may be designated, and some entities (e.g. universities or correctional facilities) may be removed from the list as relevant information became available. The list was revised based on the new boundaries of the 2000 Census Bureau urbanized area maps. Some smaller entities were removed based on new allowances in the Rule language.

A Notification Letter was mailed in December 2002 to all known entities that will be subject to Rule 13. Two versions of this letter were mailed, and the link is an example of one of these versions. In August 2003, a Deadline Submittal Letter was mailed to all known entities subject to Rule 13. A final list of Designated MS4 Entities Currently Permitted is available and includes permit numbers, name of the MS4, and contact information.

The items below were used to designate MS4 entities under 327 IAC 15-13. For any of these items to be applied to an MS4 entity, the MS4 entity must have responsibility for at least one MS4 conveyance, and be located in, or contiguous to, a designated municipality or mapped Urbanized Area.

  1. Located within, or contiguous to, a mapped 2000 United States Census Bureau Urbanized Area (UA) and is:
    1. A municipality, regardless of its United States Census Bureau population; or
    2. a university, college, military base, hospital, or correctional facility with a full-time equivalent enrollment, daily user population, or bed count occupancy (based on the most recent enrollment count, or population data) greater than or equal to one thousand (1,000).
  2. A county that contains a mapped UA. Only the portion of the county that contains the mapped UA, as delineated by political township or section, township, and range boundaries, must be regulated. If only a portion of the county contains a mapped UA, the MS4 entity may elect to regulate, to the extent of its authority, any additional portion of the county, as delineated by political township or section, township, and range boundaries, under this rule.
  3. A documented significant contributor of pollutants to waters or a regulated MS4 area.
  4. A municipality with a population density, according to 2000 United States Census Bureau data, of five hundred (500) people per square mile or greater and United States Census Bureau population of ten thousand (10,000) or more.
  5. A municipality with a population density, according to 2000 United States Census Bureau data, of five hundred (500) people per square mile or greater, United States Census Bureau population greater than seven thousand (7,000) and less than ten thousand (10,000) and having a positive, ten (10) year population growth percentage greater than or equal to ten percent (10%).
  6. A municipality with a population density, according to 2000 United States Census Bureau data, of five hundred (500) people per square mile or greater, United States Census Bureau population greater than seven thousand (7,000) and less than ten thousand (10,000) and having a university or college full-time equivalent enrollment, military base population, hospital bed count occupancy, or correctional facility daily user population (based on the most recent enrollment, count, or population data) that places the total population greater than or equal to ten thousand (10,000).
  7. A university, college, military base, hospital, or correctional facility with a full-time equivalent enrollment, daily user population, or bed count occupancy greater than or equal to one thousand (1,000), located within a designated municipality, and having responsibility for a storm water conveyance.
  8. A conservancy district or homeowner's association with a population within their service area of greater than or equal to one thousand (1,000) people, located within a designated municipality or mapped UA, and having responsibility for a storm water conveyance.
  9. A public or private storm water utility that serves one (1) or more of the MS4 entities designated under items 1 through 8.

The 2000 Census Bureau Urbanized Area (UA) maps are available and can be downloaded from the Census Bureau website. Indiana UA maps can be found under the Anderson, Bloomington, Chicago, Cincinnati, Columbus, Evansville, Fort Wayne, Indianapolis, Kokomo, Lafayette, Louisville, Michigan City, Muncie, South Bend, and Terre Haute map references.

MS4 Entities Initially Designated

Based on 2000 Urbanized Area Map

Counties marked in bold print.

  • Alexandria
  • Allen County
  • Anderson
  • Arcadia
  • Avon
  • Bargersville
  • Bartholomew County
  • Battle Ground
  • Beech Grove
  • Bloomington
  • Boone County
  • Bristol
  • Brooklyn
  • Brownsburg
  • Carmel
  • Cedar Lake
  • Chandler
  • Chesterfield
  • Chesterton
  • Cicero
  • Clark County
  • Clarksville
  • Columbus
  • Crown Point
  • Cumberland
  • Daleville
  • Danville
  • Dayton
  • Delaware County
  • Dyer
  • East Chicago
  • Edgewood
  • Edinburgh
  • Elkhart
  • Elkhart County
  • Ellettsville
  • Evansville
  • Fishers
  • Floyd County
  • Fortville
  • Fort Wayne
  • Franklin
  • Gary
  • Georgetown
  • Goshen
  • Greenwood
  • Griffith
  • Hamilton County
  • Hammond
  • Hancock County
  • Hendricks County
  • Hidden Valley CDP*
  • Highland
  • Hobart
  • Howard County
  • Huntertown
  • Ingalls
  • Jeffersonville
  • Kokomo
  • Lafayette
  • Lake County
  • Lake Station
  • LaPorte
  • LaPorte County
  • Lawrence
  • Leo-Cedarville
  • Long Beach
  • Madison County
  • McCordsville
  • Merrillville
  • Michigan City
  • Mishawaka
  • Monroe County
  • Mooresville
  • Morgan County
  • Muncie
  • Munster
  • New Albany
  • New Chicago
  • New Haven
  • New Palestine
  • New Whiteland
  • Newburgh
  • Noblesville
  • Ogden Dunes
  • Osceola
  • Pendleton
  • Pittsboro
  • Plainfield
  • Portage
  • Porter
  • Porter County
  • Roseland
  • St. John
  • St. Joseph County
  • Schererville
  • Seelyville
  • Sellersburg
  • South Bend
  • Southport
  • Speedway
  • Terre Haute
  • Tippecanoe County
  • Trail Creek
  • Valparaiso
  • Vanderburgh County
  • Vigo County
  • Warrick County
  • Westfield
  • West Lafayette
  • W. Terre Haute
  • Whiteland
  • Yorktown
  • Zionsville

*CDP stands for Census Defined Place. These areas typically have no governmental offices, and storm water conveyances in these areas are usually the responsibility of the local county.

Based on Population and Growth Criteria:

  • Angola
  • Auburn
  • Bedford
  • Columbia City
  • Connersville
  • Crawfordsville
  • Decatur
  • Frankfort
  • Greencastle
  • Greenfield
  • Greensburg
  • Huntington
  • Jasper
  • Kendallville
  • Lakes of the 4 Seasons CDP*
  • Lebanon
  • Logansport
  • Lowell
  • Madison
  • Marion
  • Martinsville
  • New Castle
  • Peru
  • Plymouth
  • Richmond
  • Seymour
  • Shelbyville
  • Vincennes
  • Wabash
  • Warsaw
  • Washington

*CDP stands for Census Defined Place. These areas typically have no governmental offices, and storm water conveyances in these areas are usually the responsibility of the local county.

Based on University/College Enrollment and Location within an Urbanized Area:

  • Anderson Univ.
  • Ball State Univ.
  • Bethel College
  • DePauw Univ.
  • Earlham College
  • IIT-Fort Wayne Univ.
  • Indiana Univ.-Bloomington
  • Indiana Univ.-East
  • Indiana Univ.-Kokomo
  • Indiana Univ.-Northwest
  • Indiana Univ.-South Bend
  • Indiana Univ.-Southeast
  • IU/PU-Fort Wayne
  • Indiana State Univ.
  • Indiana Wesleyan Univ.
  • Ivy Tech-Bloomington
  • Ivy Tech-Muncie
  • Ivy Tech-Lafayette
  • Ivy Tech-North Central
  • Ivy Tech-Northeast
  • Ivy Tech-Northwest
  • Ivy Tech-Southwest
  • Ivy Tech-Wabash Valley
  • Purdue Univ.-W. Lafayette
  • Rose-Hulman Institute
  • St. Mary's College
  • Univ. of Evansville
  • Univ. of Notre Dame
  • Univ. of St. Francis
  • Univ. of Southern Indiana
  • Tri-State Univ.-Angola
  • Valparaiso Univ.

Based on Residential Population and Location within an Urbanized Area:

  • Aberdeen Prop. Owner's Assoc.
  • Honey Creek CD*
  • Oak Park CD*
  • Tri-County CD*
  • Twin Creeks CD*
  • Valparaiso Lakes Area CD*

* CD stands for Conservancy District.

Based on Inmate Population and Location within an Urbanized Area:

  • Lakeside-Michigan City
  • Pendleton Correctional
  • Plainfield Correctional
  • U.S. Penitentiary-Terre Haute

Urbanized Area Communities, Conservancy Districts and Counties that are conditionally exempt based on Low Population or no MS4:

  • Bethany
  • Beverly Shores
  • Burns Harbor
  • Country Club Heights
  • Dune Acres
  • Duneland Beach
  • Greenville
  • Independence Hill CD*
  • Indian Village
  • Little Wea CD*
  • Michiana Shores
  • Posey County
  • Potawattamie Park
  • River Forest
  • Selma
  • Shadeland
  • Spring Lake
  • Taylorsville CDP
  • Town of Pines
  • Tremont
  • Utica
  • West Harrison
  • Whiting
  • Woodlawn Heights

* CD stands for Conservancy District.

Urbanized Area Universities/Colleges that are conditionally exempt based on Low Enrollment or no MS4:

  • Franklin College
  • Goshen College
  • Ivy Tech-Columbus
  • Ivy Tech-Kokomo
  • Ivy Tech-South Central
  • Ivy Tech-Southeast
  • Ivy Tech-Whitewater
  • Purdue Univ.-Calumet
  • St. Mary of the Woods Col.
  • Vincennes Univ.

Urbanized Area Communities/Counties that are Covered by Indianapolis' Phase I Permit:

  • Castleton
  • Clermont
  • Crows Nest
  • Cumberland (Marion Co.)
  • Homecroft
  • Marion County
  • Meridian Hills
  • N. Crows Nest
  • Rocky Ripple
  • Spring Hill
  • Warren Park
  • Williams Creek
  • Wynnedale

Urbanized Area Universities/Colleges that are Covered by Indianapolis' Phase I Permit:

  • Butler Univ.
  • IU/PU-Indianapolis
  • Ivy Tech-Indianapolis
  • Marian College
  • Univ. of Indianapolis