Item 117/2026
Final
City of Garden Grove
INTER-DEPARTMENT MEMORANDUM
To:
Lisa L. Kim From: Samuel Kim
Dept:
City Manager Dept: Public Works
Date: 4/28/2026
Subject: Approval of an Amended and Restated National Pollution Discharge Elimination System Stormwater Permit Implementation Agreement with the County of Orange and Orange County Flood Control District. (Action Item)
OBJECTIVE
To seek City Council approval of the Amended and Restated National Pollutant Discharge Elimination System Stormwater Permit Implementation Agreement with the County of Orange (County), Orange County Flood Control District (District) and participating Orange County cities for management and implementation of the National Pollution Discharge Elimination System (NPDES) Stormwater permit.
BACKGROUND
The NPDES Stormwater Permit Implementation Agreement (Agreement) delegates the responsibilities between the County, District and all local cities for compliance with the Santa Ana Regional Water Quality Control Board (SARWQCB) and San Diego Regional Water Quality Control Board NPDES Stormwater Permits. The County is the administrator and permit holder for both NPDES permits, however, north Orange County, includin g Garden Grove, is only subject to the conditions of the SARWQCB NPDES permit.
The original Orange County NPDES Stormwater Permit Implement ation Agreement was executed in 1990 and amended in 1993 and 2002.
DISCUSSION
The proposed revised Agreement updates the 2002 agreement to reflect current regulatory requirements, administrative practices, and programmatic needs. Some of the key provisions of the revised Agreement include the clarification of responsibilities for each jurisdiction for federal and state mandated reporting, monitoring, site inspections and enforcement of Best Management Practices (BMPs) , and engagement with the Orange County City Managers’ Association for strategic input on compliance and funding . Other aspects include updates related to new legislation and an updated collaborative review process for annual operating budgets, and related regional programs.
Item 117/2026
FINANCIAL IMPACT
There is no foreseeable fiscal impact to approve the Amended and Restated National Pollution Discharge Eliminatio n System Stormwater Permit Implementation Agreement with the County of Orange and Orange County Flood Control District. The City’s financial contribution will be calculated annually based on its proportional share of land area and population, as outlined in the Agreement.
RECOMMENDATION
It is recommended that the City Council:
Approve the Amended and Restated National Pollutant Discharge Elimination System (NPDES) Stormwater Permit Implementation Agreement with the County of Orange and Orange County Flood Control District; and
Authorize the Mayor to execute the Agreement.
By: Vince Barnese, Public Works Supervisor – Environmental Section
ATTACHMENT(S)
1. 2002 Implementation Agreement restatement
2. 2026 Amended and Restated NPDES Stormwater Permit Implementation Agreement