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🌍 Environmental Rules/Stormwater Management

Stormwater Management: Chino vs Rialto

How do stormwater management rules compare between Chino, CA and Rialto, CA?

Chino has fewer restrictions than Rialto.

Chino, CA

San Bernardino County

Some Restrictions

The City of Chino is a co-permittee under the San Bernardino County Area-Wide NPDES Municipal Storm Water Permit (Order R8-2010-0036, adopted January 10, 2010 by the Santa Ana Regional Water Quality Control Board), with the San Bernardino County Flood Control District as Principal Permittee. The MS4 discharges to flood-control channels, San Antonio Channel, Cypress Channel, Chino Creek, and ultimately the Prado Basin and Santa Ana River. Only rainwater and a narrow list of allowed non-stormwater flows may enter the storm drain system.

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Rialto, CA

San Bernardino County

Heavy Restrictions

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.

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Key Facts Comparison

FactChinoRialto
MS4 PermitOrder R8-2010-0036 (San Bernardino County area-wide)Santa Ana Region Order R8-2010-0036, NPDES CAS618036
Principal permitteeSan Bernardino County Flood Control District-
Receiving watersSan Antonio Channel, Cypress Channel, Chino Creek → Prado Basin → Santa Ana River-
Development triggerWater Quality Management Plan (WQMP) with LID measures-
Construction trigger1 acre disturbance = CGP + SWPPP-
Report illicit dischargeChino Police (909) 334-3000 / Public Works (909) 334-3250-
Construction permit threshold-≥1 acre disturbed (Construction General Permit)
Local code-Rialto Municipal Code Title 13 - Public Services
Priority concern-Perchlorate plume - heightened source control
State authority-Cal. Water Code §§13260, 13385

Highlighted rows indicate differences between cities.

Chino FAQ

Can I wash my car in the driveway in Chino?

Occasional residential car washing is generally allowed as a non-stormwater discharge under the San Bernardino MS4 permit, but commercial mobile detailers and fleet washers must capture or divert wash water. Avoid heavy detergent use and never wash near a storm drain inlet.

How do I report illegal dumping into a Chino storm drain?

Call Chino Police at (909) 334-3000 during business hours or (909) 628-1234 after hours. For paint, oil, or chemical spills also call the CalEPA 24-hour spill line at 1-800-852-7550.

Do I need a Water Quality Management Plan for my project?

Yes if your project is a 'priority development project' under Order R8-2010-0036 — typically creating or replacing 5,000+ sq ft of impervious surface, restaurants, auto-service uses, parking lots, or hillside development. The WQMP is submitted with grading/building applications to Chino Engineering.

Can I drain my swimming pool to the gutter?

Only after fully dechlorinating the water (let it sit 24-48 hours after stopping chemical additions, test for zero residual chlorine) and neutralizing pH. Chlorinated pool water is an illicit discharge.

Rialto FAQ

Do I need a permit to wash my driveway in Rialto?

Wash water cannot discharge to the storm drain. Use dry methods (sweeping) or capture and dispose of wash water to the sanitary sewer with permission. Untreated discharge of soap, oil, or sediment to the gutter is an illicit discharge under Title 13.

When do I need a SWPPP for construction?

Any project disturbing 1 acre or more (including smaller sites that are part of a larger common plan) must obtain coverage under the State Construction General Permit and maintain a SWPPP. Smaller sites in Rialto still need erosion and sediment BMPs under the city WQMP.

Can I drain my pool to the street?

Only if dechlorinated and pH-neutral, and only with prior approval. Generally Rialto requires pool water to be discharged to the sanitary sewer via an approved cleanout.

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