California Proposition 65, the 1986 Drinking Water Safety and Toxic Substances Enforcement Act, was issued in November 1986 to protect California residents and the state's drinking water sources so that the water source is free of known cancers. A substance that is a birth defect or other reproductive development hazard and is truthfully notified to the resident when the product is present. The California 65 Controlled Substances List was released by OEHHA and updated quarterly, first published in 1987. Products sold to California must comply with California Act 65.

California 65 controls and evaluates whether a specific product contains toxic substances based on the case of a similar product court case. It is not recommended to test more than 960 chemicals on the list for one product, since it is almost impossible for a product to contain all the chemicals listed. The types of chemical substances and limit requirements for specific product control need to be based on the latest judgments of similar product cases. For example, if a company loses the law after a part of the product is prosecuted, a limit will be declared in the court. It will be used as a limit for the lead content of future product parts.

For different products, different materials, different chemical substances, the limit requirements are different.

Some of the California 65 Proposal Case Requirements are as follows.

The Act stipulates that no one is allowed to expose a user to these hazardous substances in the course of their business without first warning about the carcinogenic or reproductive toxicity known to the product in California. Any company with a company of more than 10 people or sold to California must have a clear and reasonable warning label on products containing chemicals that are known to be carcinogenic or reproductively toxic. This warning must clearly inform the public that the chemical is carcinogenic and reproductively toxic, allowing consumers to decide whether to purchase the product after learning the chemical information contained in the product.

Warnings can be placed in a variety of forms, directly on the product label, or by posting in the workplace, by retail store or by distributing notices, by printing in newspapers, etc. Once a chemical is listed, the company will have to complete the warning within 12 months.

Consumer products containing known carcinogens, which are sold in California for any chemical that releases carcinogenic or regenerative toxicity, must be accompanied by:

"WARNING: This product contains a chemical known to the State of California to cause cancer."

(Warning: This product contains warnings for locally known carcinogenic chemicals in California).

Chemical substances known to damage the reproductive system must be accompanied by:

"WARNING: This product can expose you to a chemical [or chemicals] known to the State of California to

Cause cancer and birth defects or other reproductive harm.

(Warning: This product contains warnings from local California known chemicals that can cause damage to the reproductive system).

The Environmental Health Hazard Assessment Office under the California Environmental Protection Agency (Cal/EPA) is responsible for the implementation of the California 65 Proposal, updating and publishing a list of chemical substances, and developing material level digital guidelines (NSCL for carcinogens and MADL for reproductive toxic chemicals) ), the company can use the above documents to know which substances need warning labels and which substances are prohibited from being released into drinking water sources.