On 10 June 2016, the Office of Environmental Health Hazard Assessment (OEHHA) proposes to adopt Proposition 65 has issued a notice on rulemaking to determine the Maximum Allowable Dose Levels (MADLs) for oral exposure to six substances.
In two separate notices, the agency gave notification that it was not proceeding on its 12 June 2015 MADL proposal, and issued a new proposed rulemaking to establish MADLs for the six substances.

• The new proposal – like the withdrawn original – calls for an MADL of 100 micrograms per day for:
• atrazine;
• propazine;
• simazine;
• 2,4-diamino-6-chloro-s-triazine (DACT);
• des-ethyl atrazine (DEA); and
• des-isopropyl atrazine (DIA).

A legal challenge to the listing of the chemicals as reproductive toxicants under Proposition 65 delayed the original rulemaking. This prevented the agency from completing it in a one-year period, as required by law.
Comments on the proposed MADLs will be accepted until 25 July.

Further information
OEHHA Notice
Safe Harbor Numbers (updated to 1 Apr. 2016)