Storm Water Discharges from Municipal Separate Storm Sewer Systems (MS4s)

NPDES Permitting Authorities in Region 10

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EPA's national website on Municipal Separate Storm Sewer Systems

Under the National Pollutant Discharge Elimination System (NPDES) storm water program, operators of large, medium and regulated small municipal separate storm sewer systems (MS4s) require authorization to discharge pollutants under an NPDES permit.

The following permits have been issued to regulated MS4s by EPA Region 10. If you have questions, contact Misha Vakoc at 206-553-6650

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

MS4 Permittee(s), NPDES Permit Number Effective dates Permit Fact Sheet Response to Comments Notes

Alaska

Municipality of Anchorage and
AK Dept. of Transportation & Public Facilities
#AKS052558 2/01/10 – 1/31/15 MOA/ADOT&PF Final Permit (PDF) (55 pp. 209K) Fact Sheet (PDF) (57 pp. 464K) Response to Comments (PDF) (48 pp. 1.1MB) As of November 1, 2009, authority to administer NPDES permits for stormwater in Alaska has been transferred to the Alaska Department of Environmental Conservation

City of Fairbanks, City of North Pole, University of Alaska-Fairbanks and AK Dept. of Transportation and Public Facilities,
#AKS-053406 6/1/05 – 5/31/10 Fairbanks et al Final Permit (PDF) (38 pp. 210K) Fact Sheet (PDF) (28 pp. 850K) Response to Comments (PDF) (20 pp. 72K) As of November 1, 2009, authority to administer NPDES permits for stormwater in Alaska has been transferred to the Alaska Department of Environmental Conservation

Fairbanks North Star Borough
#AKS-053414 6/1/05 – 5/31/10 Fairbanks North Star Borough Final Permit (PDF) (34 pp. 174K) Fact Sheet (PDF) (26 pp. 803K) Response to Comments (PDF) (12 pp. 53K) As of November 1, 2009, authority to administer NPDES permits for stormwater in Alaska has been transferred to the Alaska Department of Environmental Conservation

Idaho

Ada County Highway District MS4,
#IDS-028185 10/15/09 – 10/14/14 Ada County Highway District Final Permit (PDF) (34 pp. 145K) Fact Sheet (PDF) (44 pp. 489K) Response to Comments (PDF) (41 pp. 245K)

Boise, Idaho Transportation Dept. #3, Garden City, Ada County Highway District, Drainage District #3 MS4s
#IDS-027561 11/29/00 – 11/29/05 Boise et al Final Permit (PDF) (41 pp. 111K) Fact Sheet (PDF) (19 pp. 57K) Response to Comments (PDF) (26 pp. 63K) A proposed permit is available for public comment through January 30, 2012

Caldwell MS4
#IDS-028118 10/15/09 – 10/14/14 Caldwell Final Permit (PDF) (32 pp. 141K) Fact Sheet (PDF)
(45 pp. 481K) Response to Comments (PDF) (41 pp. 220K) This permit has been appealed

Canyon Highway District #4 MS4
#IDS-028134 10/15/09 – 10/14/14 Canyon Highway District #4 Final Permit (PDF) (32 pp. 128K) Fact Sheet (PDF) (43 pp. 484K) Response to Comments (PDF) (33 pp. 219K)

Coeur d’Alene MS4
#IDS-028215 1/1/09 – 12/31/14 Coeur d’Alene Final Permit (PDF) (32 pp. 242K) Fact Sheet (PDF)
(40 pp. 491K) Response to Comments (PDF) (12 pp. 543K)

Idaho Falls and Idaho Transportation Department District #6
MS4
#IDS-028070 5/1/07 – 4/30/12 Idaho Falls & ITD #6 Final Permit (PDF) (30 pp. 229K) Fact Sheet (PDF)
(35 pp. 806K) Response to Comments (PDF) (12 pp. 264K)

Idaho Transportation Department District #1 MS4
#IDS-028223 1/1/09 – 12/31/14 ITD #1Final Permit (PDF) (33 pp. 152K) Fact Sheet (PDF) (41 pp. 823K) Response to Comments (PDF) (15 pp. 591K)

Idaho Transportation Department District #2 MS4
#IDS-028258 ITD #2 Proposed Permit (PDF) (31 pp. 164K) Fact Sheet (PDF) (37 pp. 484K) This permit has not yet been finalized by EPA

Idaho Transportation Department District #3 MS4
#IDS-028177 10/15/09 – 10/14/14 ITD #3 Final Permit (PDF) (34 pp. 145K) Fact Sheet (PDF) (45 pp. 493K) Response to Comments (PDF) (35 pp. 201K)

Lakes Highway District MS4
#IDS-028207 1/1/09 – 12/31/14 Lakes Highway District Final Permit (PDF) (32 pp. 132K) Fact Sheet (PDF) (39 pp. 775K) Response to Comments (PDF) (14 pp. 513K)

Lewiston MS4
#IDS-028061 Lewiston Proposed Permit (PDF) (32 pp. 167K) Fact Sheet (PDF) (40 pp. 500K) This permit has not yet been finalized by EPA

Middleton MS4
#IDS-028100 10/15/09 – 10/14/14 Middleton Final Permit (PDF) (32 pp. 140K) Fact Sheet (PDF) (44 pp. 486K) Response to Comments (PDF) (35 pp. 218K)

Nampa MS4
#IDS-028126 10/15/09 – 10/14/14 Nampa Final Permit (PDF) (32 pp. 140K) Fact Sheet (PDF) (44 pp. 481K) Response to Comments (PDF) (37 pp. 207K)

Nampa Highway District #1 MS4
#IDS-028142 10/15/09 – 10/14/14 Nampa Highway District #1 Final Permit (PDF) (32 pp. 138K) Fact Sheet (PDF) (43 pp. 484K) Response to Comments (PDF) (33 pp. 195K)

Notus-Parma Highway District #2 MS4
#IDS-028151 10/15/09 – 10/14/14 Notus Parma Highway District #2 Final Permit (PDF) (32 pp. 126K) Fact Sheet (PDF) (42 pp.459K) Response to Comments (PDF) (35 pp. 289K)

Pocatello, Chubbuck, Bannock County, Idaho Transportation Department District #5 MS4s
#IDS-028053 12/15/06 – 12/14/11 Pocatello et al Final Permit (PDF) (35 pp. 126K) Fact Sheet (PDF) (41 pp. 407K) Response to Comments (PDF) (49 pp. 497K)

Post Falls MS4
#IDS-028231 1/1/09 – 12/31/14 Post Falls Final Permit (PDF) (32 pp. 236K) Fact Sheet (PDF) (40 pp. 752K) Response to Comments (PDF) (12 pp. 949K)

Post Falls Highway District MS4s
#IDS-028193 1/1/09 – 12/31/14 Post Falls Highway District Final Permit (PDF) (33 pp. 236K) Fact Sheet (PDF) (39 pp. 767K) Response to Comments (PDF) (17 pp. 57K)

MS4 Permittee(s), NPDES Permit Number	Effective dates	Permit	Fact Sheet	Response to Comments	Notes
Alaska
Municipality of Anchorage and AK Dept. of Transportation & Public Facilities #AKS052558	2/01/10 – 1/31/15	MOA/ADOT&PF Final Permit (PDF) (55 pp. 209K)	Fact Sheet (PDF) (57 pp. 464K)	Response to Comments (PDF) (48 pp. 1.1MB)	As of November 1, 2009, authority to administer NPDES permits for stormwater in Alaska has been transferred to the Alaska Department of Environmental Conservation
City of Fairbanks, City of North Pole, University of Alaska-Fairbanks and AK Dept. of Transportation and Public Facilities, #AKS-053406	6/1/05 – 5/31/10	Fairbanks et al Final Permit (PDF) (38 pp. 210K)	Fact Sheet (PDF) (28 pp. 850K)	Response to Comments (PDF) (20 pp. 72K)	As of November 1, 2009, authority to administer NPDES permits for stormwater in Alaska has been transferred to the Alaska Department of Environmental Conservation
Fairbanks North Star Borough #AKS-053414	6/1/05 – 5/31/10	Fairbanks North Star Borough Final Permit (PDF) (34 pp. 174K)	Fact Sheet (PDF) (26 pp. 803K)	Response to Comments (PDF) (12 pp. 53K)	As of November 1, 2009, authority to administer NPDES permits for stormwater in Alaska has been transferred to the Alaska Department of Environmental Conservation
Idaho
Ada County Highway District MS4, #IDS-028185	10/15/09 – 10/14/14	Ada County Highway District Final Permit (PDF) (34 pp. 145K)	Fact Sheet (PDF) (44 pp. 489K)	Response to Comments (PDF) (41 pp. 245K)
Boise, Idaho Transportation Dept. #3, Garden City, Ada County Highway District, Drainage District #3 MS4s #IDS-027561	11/29/00 – 11/29/05	Boise et al Final Permit (PDF) (41 pp. 111K)	Fact Sheet (PDF) (19 pp. 57K)	Response to Comments (PDF) (26 pp. 63K)	A proposed permit is available for public comment through January 30, 2012
Caldwell MS4 #IDS-028118	10/15/09 – 10/14/14	Caldwell Final Permit (PDF) (32 pp. 141K)	Fact Sheet (PDF) (45 pp. 481K)	Response to Comments (PDF) (41 pp. 220K)	This permit has been appealed
Canyon Highway District #4 MS4 #IDS-028134	10/15/09 – 10/14/14	Canyon Highway District #4 Final Permit (PDF) (32 pp. 128K)	Fact Sheet (PDF) (43 pp. 484K)	Response to Comments (PDF) (33 pp. 219K)
Coeur d’Alene MS4 #IDS-028215	1/1/09 – 12/31/14	Coeur d’Alene Final Permit (PDF) (32 pp. 242K)	Fact Sheet (PDF) (40 pp. 491K)	Response to Comments (PDF) (12 pp. 543K)
Idaho Falls and Idaho Transportation Department District #6 MS4 #IDS-028070	5/1/07 – 4/30/12	Idaho Falls & ITD #6 Final Permit (PDF) (30 pp. 229K)	Fact Sheet (PDF) (35 pp. 806K)	Response to Comments (PDF) (12 pp. 264K)
Idaho Transportation Department District #1 MS4 #IDS-028223	1/1/09 – 12/31/14	ITD #1Final Permit (PDF) (33 pp. 152K)	Fact Sheet (PDF) (41 pp. 823K)	Response to Comments (PDF) (15 pp. 591K)
Idaho Transportation Department District #2 MS4 #IDS-028258		ITD #2 Proposed Permit (PDF) (31 pp. 164K)	Fact Sheet (PDF) (37 pp. 484K)		This permit has not yet been finalized by EPA
Idaho Transportation Department District #3 MS4 #IDS-028177	10/15/09 – 10/14/14	ITD #3 Final Permit (PDF) (34 pp. 145K)	Fact Sheet (PDF) (45 pp. 493K)	Response to Comments (PDF) (35 pp. 201K)
Lakes Highway District MS4 #IDS-028207	1/1/09 – 12/31/14	Lakes Highway District Final Permit (PDF) (32 pp. 132K)	Fact Sheet (PDF) (39 pp. 775K)	Response to Comments (PDF) (14 pp. 513K)
Lewiston MS4 #IDS-028061		Lewiston Proposed Permit (PDF) (32 pp. 167K)	Fact Sheet (PDF) (40 pp. 500K)		This permit has not yet been finalized by EPA
Middleton MS4 #IDS-028100	10/15/09 – 10/14/14	Middleton Final Permit (PDF) (32 pp. 140K)	Fact Sheet (PDF) (44 pp. 486K)	Response to Comments (PDF) (35 pp. 218K)
Nampa MS4 #IDS-028126	10/15/09 – 10/14/14	Nampa Final Permit (PDF) (32 pp. 140K)	Fact Sheet (PDF) (44 pp. 481K)	Response to Comments (PDF) (37 pp. 207K)
Nampa Highway District #1 MS4 #IDS-028142	10/15/09 – 10/14/14	Nampa Highway District #1 Final Permit (PDF) (32 pp. 138K)	Fact Sheet (PDF) (43 pp. 484K)	Response to Comments (PDF) (33 pp. 195K)
Notus-Parma Highway District #2 MS4 #IDS-028151	10/15/09 – 10/14/14	Notus Parma Highway District #2 Final Permit (PDF) (32 pp. 126K)	Fact Sheet (PDF) (42 pp.459K)	Response to Comments (PDF) (35 pp. 289K)
Pocatello, Chubbuck, Bannock County, Idaho Transportation Department District #5 MS4s #IDS-028053	12/15/06 – 12/14/11	Pocatello et al Final Permit (PDF) (35 pp. 126K)	Fact Sheet (PDF) (41 pp. 407K)	Response to Comments (PDF) (49 pp. 497K)
Post Falls MS4 #IDS-028231	1/1/09 – 12/31/14	Post Falls Final Permit (PDF) (32 pp. 236K)	Fact Sheet (PDF) (40 pp. 752K)	Response to Comments (PDF) (12 pp. 949K)
Post Falls Highway District MS4s #IDS-028193	1/1/09 – 12/31/14	Post Falls Highway District Final Permit (PDF) (33 pp. 236K)	Fact Sheet (PDF) (39 pp. 767K)	Response to Comments (PDF) (17 pp. 57K)

Storm Water Discharges from Municipal Separate Storm Sewer Systems (MS4s)

NPDES Permitting Authorities in Region 10

More Information

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