NOTICE: The Lake County General Health District has received a new supply of potassium iodide (KI) tablets to replace old tablets that expired at the end of 2021.  Please see information for residents and businesses below for information on how to get new KI.  The new supply will not expire until October 31, 2029.  Please note this program is ONLY for residents who live or businesses with physical locations within 10 miles of the Perry Nuclear Power Plant.  Proof of residence or business within this zone is now required effective March 16, 2022.


The Lake County General Health District (LCGHD) provides free potassium iodide (KI) tablets for Lake County residents and businesses within the 10-mile Emergency Planning Zone (EPZ) around the Perry Nuclear Power Plant.  The EPZ also includes portions of Ashtabula and Geauga counties, and those residents and businesses are provided KI by their respective health departments.

Radioactive iodine may be released from a nuclear power plant during an emergency.  If breathed or swallowed, it can damage your thyroid gland, which could cause loss of thyroid function, nodules, or thyroid cancer.  Children are at greater risk for thyroid damage than adults.  Use of KI, which is a non-prescription medication, protects your thyroid gland by saturating the thyroid gland with non-radioactive iodine, blocking harmful radioactive iodine from being absorbed.  KI only protects the thyroid from radioactive iodine.  It does not protect other parts of the body from radioactive iodine and does not protect against other forms of radiation.

KI is unlikely to protect you from the health effects of a nuclear bomb explosion. It only protects the thyroid gland after breathing, eating, or drinking something that is contaminated with one type of radioactive material: radioactive iodine (I-131), which could be released in a nuclear power plant emergency. Fallout from a nuclear bomb is made up of hundreds of types of radioactive materials, and contains a relatively small amount of radioactive iodine. For more information on protecting yourself during radiation emergencies, please visit this CDC website.

Please see information below for obtaining new KI for residents and businesses.

KI Information for Residents

KI Information for Businesses