Ontario enforces the Santa Ana Regional MS4 permit requiring erosion control, trash capture, and Low Impact Development for projects over 5,000 square feet, with enforcement through OMC Chapter 5 Article VI.
Ontario is a co-permittee of the Santa Ana Regional Municipal Separate Storm Sewer System (MS4) permit administered by the Santa Ana Regional Water Quality Control Board. Under Ontario Municipal Code Chapter 5 Article VI (Stormwater and Urban Runoff), it is unlawful to discharge anything other than clean rainwater to the municipal storm drain system. Pollutants such as concrete washout, paint thinner, motor oil, pet waste, and sediment are prohibited. Construction projects disturbing 1 acre or more must file a Notice of Intent for the Construction General Permit (CGP) with the State Water Board and prepare a Stormwater Pollution Prevention Plan (SWPPP). Priority development projects creating 5,000 square feet of impervious area must include Low Impact Development (LID) features such as bioswales, permeable pavers, or cisterns per the San Bernardino County Technical Guidance Document. Violations carry administrative fines up to 10,000 dollars per day under California Water Code 13385. Report illegal dumping to the Ontario hotline at (909) 395-2025.
Contact your local code enforcement office for specific penalty information.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Ontario, CA
Ontario Municipal Code section 5-29.14 prohibits operating any motor vehicle in a condition that creates excessive, impulsive or intrusive noise, including e...
Ontario, CA
Outdoor music is regulated under OMC Title 5 Chapter 29 and the special-event permit process. Venues and events with amplified sound need a city permit; resi...
Ontario, CA
No Ontario-specific ordinance directly regulates aircraft noise; the City's noise chapter exempts activities preempted by state or federal law (OMC 5-29.06(h...
Ontario, CA
Ontario prohibits razor wire on any wall or fence citywide, and bans barbed wire and electrified fences in residential, commercial, and residential mixed-use...
Ontario, CA
Every wall, fence, and gate in Ontario is subject to Planning Director design review regardless of whether a building permit is needed. A building permit is ...
Ontario, CA
Ontario fence requirements include zoning-based heights, setbacks, sight triangles, buffer walls on industrial edges, and CBC structural standards. Pool, ret...
Side-by-side rule comparisons with other cities in San Bernardino County.
See how other cities in San Bernardino County handle stormwater management.
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