Rocklin Municipal Code Chapter 8.30 (Stormwater Runoff Pollution Control) prohibits non-stormwater discharges into the City's storm drain system. Rocklin is a Phase II Small MS4 permittee under State Water Board Order WQO 2013-0001-DWQ (NPDES CAS000004) and enforces illicit discharge detection and elimination (IDDE) through the Environmental Services Division.
Rocklin Municipal Code Ch. 8.30 (Stormwater Runoff Pollution Control) authorizes the Enforcement Official to require proof of NPDES compliance from any person subject to an industrial or construction stormwater discharge permit (§8.30.060). The City's stormwater program (administered by Environmental Services at rocklin.ca.us/stormwater) targets illegal discharge detection and elimination, street and storm drain cleaning, and creek maintenance. As a Phase II Small MS4 permittee under the State Water Board's General Permit WQO 2013-0001-DWQ, Rocklin must implement the six Minimum Control Measures including public outreach, IDDE, construction-site runoff control, and post-construction stormwater management consistent with its January 2019 Post-Construction Manual. Only stormwater and a short list of conditionally exempt non-stormwater flows (e.g., landscape irrigation, dechlorinated pool water meeting BMP criteria) may enter the storm drain.
Illicit discharges to the MS4 are violations of Ch. 8.30 enforceable as infractions or misdemeanors under the Municipal Code general penalty (Title 1) and may also trigger Central Valley Regional Water Quality Control Board administrative civil liability up to $10,000 per day per Cal. Water Code §13385.
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