Rialto is a co-permittee on the San Bernardino County MS4 NPDES Permit issued by the Santa Ana Regional Water Quality Control Board (Order R8-2010-0036, NPDES No. CAS618036) and enforces stormwater quality controls under Title 13 (Public Services) of the Municipal Code. All non-stormwater discharges to the storm drain (including wash water, paint, oil, and sediment) are prohibited, and construction sites ≥1 acre require coverage under the Statewide Construction General Permit and a SWPPP.
Rialto's stormwater program is administered jointly with San Bernardino County Flood Control District under the Santa Ana Region MS4 Permit. The historic perchlorate groundwater contamination in the Rialto-Colton Basin (a federal Superfund-eligible plume) drives unusually strict source-control enforcement. Title 13 of the Rialto Municipal Code (Public Services) prohibits any illicit discharge or connection to the municipal separate storm sewer system; only uncontaminated stormwater and certain conditionally exempt flows (landscape irrigation runoff, potable water line flushing) are allowed. New and redevelopment projects ≥1 acre or meeting Priority Development Project thresholds must implement Low-Impact Development (LID) Best Management Practices and submit a Water Quality Management Plan (WQMP) under the Santa Ana MS4 Permit. Construction projects disturbing ≥1 acre must obtain coverage under the State Water Board's Construction General Permit (Order 2022-0057-DWQ, NPDES No. CAS000002) and maintain a Storm Water Pollution Prevention Plan (SWPPP) on site. Cal. Water Code §13260 requires waste discharge reporting to the Regional Board.
Illicit discharges and SWPPP/WQMP violations are enforced by Rialto Community Compliance and the Public Works Department under Title 13 with administrative citations, stop-work orders, and abatement. State Water Code §13385 authorizes civil liability up to $10,000 per day plus $10/gallon for unauthorized discharges. Federal Clean Water Act citizen-suit and EPA penalties can reach $59,973 per day. The Santa Ana RWQCB may issue separate Cleanup and Abatement Orders.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Rialto, CA
Rialto requires permits for walls taller than 42 inches and building permits for all masonry and retaining walls. Block walls get three city inspections, and...
Rialto, CA
Barbed wire and razor wire are prohibited in all Rialto residential zones, and no sharp points may top any fence under six feet. City design standards also r...
Rialto, CA
Rialto caps household pets at four weaned dogs and cats combined, and no more than three of them may be dogs. The limit appears in Rialto Municipal Code Sect...
Rialto, CA
Backyard fires in Rialto are legal only as contained cooking or warming fires burning clean fuels such as propane, natural gas, charcoal, or untreated wood. ...
Rialto, CA
Removing a street or parkway tree requires prior written permission from the public services director, and the city's published criteria allow removal only o...
Rialto, CA
Rialto requires home-based businesses to obtain both a Home Occupation Permit from the Planning Division and a city business license. Under Rialto Municipal ...
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