Storm Water Discharges from Municipal Separate Storm Sewer Systems (MS4s) | Region 10 | US EPA

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


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 NumberEffective datesPermitFact SheetResponse to CommentsNotes
Alaska
Municipality of Anchorage and
AK Dept. of Transportation & Public Facilities
AKS052558
2/01/10 – 1/31/15MOA/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,
AKS053406
6/1/05 – 5/31/10Fairbanks 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
AKS053414
6/1/05 – 5/31/10Fairbanks 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,
IDS028185
10/15/09 – 10/14/14Ada 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, Boise State University MS4s
IDS027561
02/01/13 - 01/30/18Boise et al MS4s Final Permit (PDF) (66 pp. 334K)Boise, et al MS4 Permit Fact Sheet (PDF) (51 pp, 565K) Boise, et al MS4 Permit Response to Comment (PDF) (51 pp, 728K)
Caldwell MS4
IDS028118
10/15/09 – 10/14/14Caldwell 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
IDS028134
10/15/09 – 10/14/14Canyon 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
IDS028215
1/1/09 – 12/31/14Coeur 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
IDS028070
5/1/07 – 4/30/12Idaho 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
IDS028223
1/1/09 – 12/31/14ITD #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
IDS028258
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
IDS028177
10/15/09 – 10/14/14ITD #3 Final Permit (PDF) (34 pp. 145K)Fact Sheet (PDF) (45 pp. 493K)Response to Comments (PDF) (35 pp. 201K)
Lakes Highway District MS4
IDS028207
1/1/09 – 12/31/14Lakes Highway District Final Permit (PDF) (32 pp. 132K)Fact Sheet (PDF) (39 pp. 775K)Response to Comments (PDF) (14 pp. 513K)
Lewiston MS4
IDS028061
Lewiston Proposed Permit (PDF) (32 pp. 167K)Fact Sheet (PDF) (40 pp. 500K)This permit has not yet been finalized by EPA
Middleton MS4
IDS028100
10/15/09 – 10/14/14Middleton Final Permit (PDF) (32 pp. 140K)Fact Sheet (PDF) (44 pp. 486K)Response to Comments (PDF) (35 pp. 218K)
Nampa MS4
IDS028126
10/15/09 – 10/14/14Nampa Final Permit (PDF) (32 pp. 140K)Fact Sheet (PDF) (44 pp. 481K)Response to Comments (PDF) (37 pp. 207K)
Nampa Highway District #1 MS4
IDS028142
10/15/09 – 10/14/14Nampa 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
IDS028151
10/15/09 – 10/14/14Notus 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
IDS028053
12/15/06 – 12/14/11Pocatello et al Final Permit (PDF) (35 pp. 126K)Fact Sheet (PDF) (41 pp. 407K)Response to Comments (PDF) (49 pp. 497K)
Post Falls MS4
IDS028231
1/1/09 – 12/31/14Post 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
IDS028193
1/1/09 – 12/31/14Post Falls Highway District Final Permit (PDF) (33 pp. 236K)Fact Sheet (PDF) (39 pp. 767K)Response to Comments (PDF) (17 pp. 57K)
Washington
Joint Base Lewis-McChord Municipal Separate Storm Sewer System (MS4)
WAS026638
10/01/13 - 09/30/18Joint Base Lewis-McChord MS4 Final Permit (PDF) (69 pp, 482K)Joint Base Lewis-McChord MS4 Fact Sheet (PDF) (81 pp, 2.1 MB)Joint Base Lewis-McChord MS4 Permit Response to Comments (PDF) (67 pp, 1.4MB)


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URL: http://yosemite.epa.gov/R10/WATER.NSF/NPDES+Permits/MS4+requirements+-+Region+10

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