The City of Norman regulates the use and sale of manufactured fertilizers which contain phosphorus. This is a proactive effort to preserve and protect waterbodies within the City of Norman’s city limits including our municipal water supply, Lake Thunderbird. Commercial applicators are required to register with the City and provide their customers with information about proper fertilizer use and the effect it can have on our waterways. Commercial vendors are required to inform their customers about the phosphorus content of their products, and provide information about proper fertilizer use and the effect it can have on our waterways. 

Commercial Fertilizer Applicator Registration Form
Manufactured Fertilizer Ordinance
Keeping Our Waters "P" Free Brochure
Fertilizer Ordinance Guide for Applicators
Fertilizer Ordinance Guide for Vendors