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 Code of Federal Regulations (Last Updated: May 6, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter D - Water Programs
 Part 122 - EPA Administered Permit Programs: the National Pollutant Discharge Elimination System

  Appendix I to Part 122 - Counties With Unincorporated Urbanized Areas Greater Than 100,000, But Less Than 250,000 According to the 1990 Decennial Census by the Bureau of the Census  

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  • Appendix I to Part 122 - Counties With Unincorporated Urbanized Areas Greater Than 100,000, But Less Than 250,000 According to the 1990 Decennial Census by the Bureau of the Census

    State County Unincorporated urbanized population
    Alabama Jefferson 78,608
    Arizona Pima 162,202
    California Alameda 115,082
    Contra Costa 131,082
    Kern 128,503
    Orange 223,081
    Riverside 166,509
    San Bernardino 162,202
    Colorado Arapahoe 103,248
    Florida Broward 142,329
    Escambia 167,463
    Hillsborough 398,593
    Lee 102,337
    Manatee 123,828
    Orange 378,611
    Palm Beach 360,553
    Pasco 148,907
    Pinellas 255,772
    Polk 121,528
    Sarasota 172,600
    Seminole 127,873
    Georgia Clayton 133,237
    Cobb 322,595
    Fulton 127,776
    Gwinnett 237,305
    Richmond 126,476
    Kentucky Jefferson 239,430
    Louisiana East Baton Rouge 102,539
    Parish 331,307
    Jefferson Parish
    Maryland Howard 157,972
    North Carolina Cumberland 146,827
    Nevada Clark 327,618
    Oregon Multnomah1 52,923
    Washington 116,687
    South Carolina Greenville 147,464
    Richland 130,589
    Virginia Arlington 170,936
    Chesterfield 174,488
    Henrico 201,367
    Prince William 157,131
    Washington Pierce 258,530
    Snohomish 157,218

    1 County was previously listed in this appendix; however, population dropped to below 100,000 in the 1990 Census.

    [64 FR 68849, Dec. 8, 1999]