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§ 3991.1. Amendment to the Water Quality Control Plan for the San Diego Basin (9) to Change the...


Barclays Official California Code of Regulations Currentness
Title 23. Waters
Division 4. Regional Water Quality Control Boards
Chapter 1. Water Quality Control Plans, Policies, and Guidelines
Article 9. San Diego Region
23 CCR § 3991.1
§ 3991.1. Amendment to the Water Quality Control Plan for the San Diego Basin (9) to Change the Nitrate Water Quality Objective for Groundwaters, Incorporate the Onsite Wastewater Treatment Systems Policy, and Incorporate Miscellaneous Updates.
The California Regional Water Quality Control Board, San Diego Region, adopted Resolution No. R9-2015-0008 on April 15, 2015, amending the Water Quality Control Plan for the San Diego Basin (9) (Basin Plan). The State Water Resources Control Board approved the amendment by adopting State Board Resolution No. 2015-0066 on November 17, 2015.
The purpose of this Basin Plan amendment is to revise several chapters within the Basin Plan. The nitrate water quality objective for groundwater was made consistent with the allowable maximum contaminant level for drinking water at 45 mg/L nitrate as NO3 in all hydrologic areas/subareas with numeric objectives, except in the Warner Valley Hydrologic Area. Warner Valley's freshwater replenishment beneficial use designation for groundwater precludes raising the nitrate water quality objective. The Basin Plan amendment revises existing provisions for regulation of onsite wastewater treatment systems and incorporates the provisions of the State Water Resources Control Board's Water Quality Control Policy for Siting, Design, Operation, and Maintenance of Onsite Wastewater Treatment Systems. Implementation provisions were added for the nitrate groundwater quality objective to protect surface-water quality where groundwater and surface water are interconnected. An implementation provision prohibiting private ownership of community sewerage systems was removed from the Basin Plan. Other revisions also included addition of descriptions of current statewide policies, deletion of expired conditional waivers, and other minor non-substantive changes.
1. New section summarizing amendments to basin plan filed 5-17-2016; amendments approved by State Water Resources Control Board Resolution No. R9-2015-0008 on 4-15-2015; amendments approved by OAL pursuant to Government Code section 11353 on 5-17-2016 (Register 2016, No. 21).
This database is current through 6/17/22 Register 2022, No. 24
23 CCR § 3991.1, 23 CA ADC § 3991.1
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