Harmful Algal Blooms (HABs)
Harmful algal blooms (HABs) are blue-green algal blooms that contain toxins that can cause illness in humans and animals.
- Harmful Algal Blooms (HABs) Fact Sheet
Frequently asked questions about blue-green algae and HABs including information about health effects and what you should do if you see a bloom.
- Causes and Symptoms of Harmful Algal Bloom-Related Illness
HAB-related illness facts, including common symptoms and how people are exposed.
- Preventing Harmful Algal Bloom-Related Illness
Learn how to minimize your risk of exposure to cyanotoxins.
- Harmful Algal Bloom-Related Illness in Animals
Information about how animals are exposed to cyanotoxins, common symptoms, and preventative measures.
- Tools for Local Government Agencies
Sample materials designed to assist local authorities with lake and beach advisories due to blue-green algae.
- Harmful Algal Bloom-Related Illness Information for Veterinarians
Reporting information, symptoms, differential diagnoses, possible laboratory findings and more.
For additional information about blue-green algae and HABs:
- Health Consultation
Health consultation for Little Rock Lake following a severe bloom in July 2007. Information about exposure to microcystin.
- Health-Based Water Guidance for Microcystin
Information about health-based rules and guidance for microcystin-LR in water.
- Blue-Green Algae and Harmful Algal Blooms
MPCA; Information about HABs in Minnesota including pictures of what HABs look like. Attention: Non-MDH site
- Harmful Algal Bloom (HAB)-Associated Illness
CDC; Information about sources of exposure and risk factors, signs and symptoms of HAB-related illnesses, and prevention and controls measures. Attention: Non-MDH site
- Harmful Algal Blooms
EPA; Information about what HABs are, how to stay safe, and how to prevent HABs from forming. Attention: Non-MDH site
- Cyanobacterial Harmful Algal Blooms (CyanoHABs)
EPA; Information about cyanotoxins, including how to prevent, detect, mitigate, and treat them. Attention: Non-MDH site