Regulations last checked for updates: Nov 22, 2024

Title 40 - Protection of Environment last revised: Nov 20, 2024
All TitlesTitle 40Chapter IPart 122Subpart DAppendix Appendix H - Appendix H to Part 122—Counties With Unincorporated Urbanized Areas With a Population of 250,000 or More According to the 1990 Decennial Census by the Bureau of the Census
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Appendix Appendix H - Appendix H to Part 122—Counties With Unincorporated Urbanized Areas With a Population of 250,000 or More According to the 1990 Decennial Census by the Bureau of the Census
State County Unincorporated urbanized population
CaliforniaLos Angeles886,780
Sacramento594,889
San Diego250,414
DelawareNew Castle296,996
FloridaDade1,014,504
GeorgiaDeKalb448,686
HawaiiHonolulu 1114,506
MarylandAnne Arundel344,654
Baltimore627,593
Montgomery599,028
Prince George's494,369
TexasHarris729,206
UtahSalt Lake270,989
VirginiaFairfax760,730
WashingtonKing520,468

1 County was previously listed in this appendix; however, population dropped to below 250,000 in the 1990 Census.

[64 FR 68848, Dec. 8, 1999]
authority: The Clean Water Act, 33 U.S.C. 1251
source: 48 FR 14153, Apr. 1, 1983, unless otherwise noted.
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