Chapter 6 : Sanitary Sewer Overflows (SSOs)

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Wet Weather Benchmarking Report Chapter 6: Sanitary Sewer Overflows Michigan MI DEQ does allow blending at a limited number of facilities (less than five). At these facilities, the blending operates with an interim authorization and the facilities’ NPDES permits contain a requirement to eliminate the blending. Minnesota Blending is not allowed in any of MPCA’s wastewater treatment plant permits. Missouri MO DNR does allow blending at wastewater treatment plants, and does not consider blending to be a temporary solution. The U.S. EPA recently objected to the issuance of such permits. Montana MT DEQ does not allow blending in any of its wastewater treatment plant permits. Nevada Blending is not allowed in any of NV DEP’s wastewater treatment plant permits. New Hampshire: See EPA Region 1. New Jersey Blending is not allowed in any of NJDEP’s wastewater treatment plant permits. New York Wastewater treatment plant permits issued by NYSDEC contain provisions for the blending of treated wastewater with the mixture of storm water and untreated sewage, and this blending does not operate with an interim authorization or schedule for elimination. North Carolina Blending is not allowed in any of NC DENR’s wastewater treatment plant permits. North Dakota ND DoH does not allow blending in any of its wastewater treatment plant permits. Ohio Blending is not allowed in any of OH EPA’s permits. Oklahoma Blending is not allowed in any of OK DEQ’s wastewater treatment plant permits. Oregon Blending is not allowed in any of OR DEQ’s permits. Rhode Island Two of Rhode Island’s wastewater treatment plants that have combined sewer systems have both dry weather outfalls and wet weather outfalls. All discharges from the dry weather outfalls must meet secondary treatment 6-18 Last modified on May 5, 2010
Wet Weather Benchmarking Report Chapter 6: Sanitary Sewer Overflows requirements, while wet weather discharges must meet only primary treatment requirements. All effluent from wastewater treatment plants with separate collection systems must meet secondary treatment requirements. Texas Blending is not allowed in any of TCEQ’s wastewater treatment plant permits. Virginia Blending is not allowed in any of VA DEQ’s wastewater treatment plant permits. Washington WA DOE does not allow blending in any of its wastewater treatment plant’s permits. Wisconsin In some cases, in-plant diversions are allowed, but the discharged effluent must still meet any WPDES permit effluent limits. Such blending operates with an interim authorization and WI DNR is in the process of preparing a set of “SSO Rules” that will address blending. Wyoming Blending is not allowed in any of WY DEQ’s wastewater treatment plant’s permits. 1 Email correspondence from James Fischer, California State Water Resources Control Board, Office of Enforcement/Special Investigations Unit on 23 February 2010. 2 Sanitary Sewer Overflow Survey. U.S. EPA HQ Response. 5 August 2009. Unless otherwise indicated, this reference applies to all information about EPA’s SSO policies. 3 Sanitary Sewer Overflow Survey. U.S. EPA Region 1 Response. 5 August 2009. Unless otherwise indicated, this reference applies to all information about EPA Region 1’s SSO policies. 4 Sanitary Sewer Overflow Survey. U.S. EPA Region 4 Response. 21 July 2009. Unless otherwise indicated, this reference applies to all information about EPA Region 4’s SSO policies. 5 Sanitary Sewer Overflow Survey. U.S. EPA Region 5 Response. 24 July 2009. Unless otherwise indicated, this reference applies to all information about EPA Region 5’s SSO policies. 6 Sanitary Sewer Overflow Survey. U.S. EPA Region 6 Response. 23 July 2009. Unless otherwise indicated, this reference applies to all information about EPA Region 6’s SSO policies. 7 Sanitary Sewer Overflow Survey. AZ DEQ Response. 14 August 2009. Unless otherwise indicated, this reference applies to all information about AZ DEQ’s SSO policies. 8 Sanitary Sewer Overflow Survey. CDPHE Response. 21 August 2009. Unless otherwise indicated, this reference applies to all information about CDPHE’s SSO policies. 9 Sanitary Sewer Overflow Survey. CT DEP Response. 21 July 2009. Unless otherwise indicated, this reference applies to all information about CT DEP’s SSO policies. 10 Sanitary Sewer Overflow Survey. FL DEP Response. 24 July 2009. Unless otherwise indicated, this reference applies to all information about FL DEP’s SSO policies. 11 Sanitary Sewer Overflow Survey. GA DNR Response. 20 July 2009. Unless otherwise indicated, this reference applies to all information about GA DNR’s SSO policies. 12 Sanitary Sewer Overflow Survey. IDEM Response. 4 August 2009. Unless otherwise indicated, this reference applies to all information about IDEM’s SSO policies. 13 Sanitary Sewer Overflow Survey. IA DNR Response. 22 July 2009. Unless otherwise indicated, this reference applies to all information about IA DNR’s SSO policies. 14 Sanitary Sewer Overflow Survey. KDHE Response. 21 July 2009. Unless otherwise indicated, this reference applies to all information about KDHE’s SSO policies. Last modified on May 5, 2010 6-19
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Chapter 6 : Sanitary Sewer Overflows (SSOs)

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