California Proposition 65 — Safe Drinking Water and Toxic Enforcement Act of 1986
Record:
plastics-polymer-cert-025(Plastics/Polymer, license regulation). Issuing body: California OEHHA (Office of Environmental Health Hazard Assessment).
1. What it is, who issues and enforces it
Proposition 65 is a California ballot initiative (1986) requiring businesses to provide warnings before knowingly exposing people to listed chemicals known to cause cancer, birth defects, or other reproductive harm, and prohibiting discharges of listed chemicals into drinking-water sources. OEHHA administers the Prop 65 list (900+ chemicals). Enforcement is famously plural: the Attorney General, district/city attorneys — and, critically, private enforcers (bounty-hunter plaintiffs) who may sue after a 60-day notice and keep a share of penalties. This private-enforcement engine is what makes Prop 65 the most-litigated chemicals-warning regime in the world.
2. Scope, triggers, thresholds
Applies to businesses with 10 or more employees operating or selling products in California. Two duties:
- Warnings: a "clear and reasonable warning" before knowing exposure to a listed chemical above its safe harbor level — Maximum Allowable Dose Levels (MADLs) for reproductive toxicants, No Significant Risk Levels (NSRLs) for carcinogens. No warning is required below the safe harbor level; above it (or where no safe harbor exists), warn.
- Discharge prohibition: no knowing discharge of listed chemicals into sources of drinking water (with a 20-month grace period after listing).
For plastics, the listed chemicals that matter most: BPA (reproductive), phthalates (DEHP, DBP, BBP, DIDP — reproductive/cancer), styrene (cancer), formaldehyde (cancer), lead and cadmium (legacy pigments/stabilizers), carbon black (airborne, unbound particles — cancer listing with exposure-route nuance), and various flame retardants.
Warning methods: on-product labels, shelf signs, website warnings for internet sales (with specific regulatory language and the ⚠ symbol requirements in Article 6 "clear and reasonable warnings" regulations, revised 2018).
3. Key compliance obligations
- Formulation screening against the current Prop 65 list (updated at least annually — check the current list; chemicals are added regularly).
- Exposure assessment against safe harbor levels — where no safe harbor exists, any detectable exposure above background can trigger the duty.
- Warning implementation per the Article 6 content/form rules (chemical name, endpoint, URL www.P65Warnings.ca.gov, symbol, language requirements including Spanish in some contexts).
- Supply-chain warranties — obtain Prop 65 compliance representations from resin/additive suppliers; the brand owner/seller bears the enforcement risk.
- 60-day-notice response readiness — notices arrive constantly; a documented screening file is the settlement lever.
4. Penalties and consequences
- Civil penalties: up to $2,500 per violation per day — and each unit sold without a required warning can be a separate violation, so exposure multiplies across SKUs and sales volume.
- Private-enforcer settlements: the dominant outcome — settlements routinely include civil penalties (a share to the plaintiff), plaintiff's attorney's fees, and injunctive reformulation/relabeling commitments. Annual settlement totals run into the tens of millions statewide.
- Injunctive relief: courts can order warnings or product reformulation.
5. Version and live changes (checked 2026-09-30)
- The list grows continuously — OEHHA adds chemicals via authoritative-body listings, Labor Code mechanisms, and the state's qualified-experts process. Recent years have added PFAS-related and other substances; always screen against the current list, never a cached copy.
- Short-form warning rulemaking: OEHHA has revised the short-form warning content requirements (the abbreviated on-product warning) — verify the current Article 6 requirements, as the short-form language rules changed and compliance dates have applied.
- Acrylamide/food context litigation continues, but for plastics the relevant front is additives and colorants.
6. Related certifications
- RJG Master Molder I/II (Plastics flagship) — molders must know which additives/colorants in their formulations are listed; a molder that substitutes an unlisted-for-listed colorant creates the exposure.
- ISO 13485 — medical devices have a nuanced Prop 65 posture (federal preemption arguments exist but are contested); device packaging and components still get screened.
- No Prop-65-specific individual certification exists.
7. Honest flags
- Prop 65 is a warning law, not a ban — a listed chemical may be legally present with a proper warning. The business decision is warn vs. reformulate, and plaintiffs exploit the reputational cost of warnings.
- Safe harbor levels exist for many but not all listed chemicals; absence of a safe harbor does not mean absence of duty.
- Private enforcement means even technically compliant companies receive notices — the screening file is a cost of doing business in California.
Record: plastics-polymer-cert-025.
Original ETS reference writing, verified against public sources on 2026-09-30. Thin sourcing is flagged inline. Not legal advice — confirm current editions with the issuing body.