Status: Confirmed

There have been reports of blue-green algae blooms in the following lakes throughout the Apache-Sitgreaves National Forest;

Alpine Ranger District:

• Luna Lake
• Big Lake
• Nelson Reservoir - no recent data

Springerville Ranger District:

• Tunnel Reservoir
• River Reservoir

Pine-top/Lakeside Ranger District:

• Rainbow Lake - awaiting confirmation
• Show Low Lake - no recent data

Black Mesa Ranger District:

• Chevelon Canyon Lake

Lyman Lake State Park:

• Lyman Lake

Please take necessary precautions and avoid any areas that have algal blooms. Do not consume fish caught in an algal bloom. Refer to our identification guide so you know what to look out for | View Guide > 

When in Doubt, Stay Out!

Please take the necessary precautions and avoid any areas with algal blooms. Do not consume fish caught in an algal bloom. Refer to our identification guide so you know what to look out for.

Additional Resources and Information: 

• For resources, tools & to report illness | View AZDHS HABs >
• For current lake conditions, reach out to the appropriate district office of the Apache-Sitgreaves National Forest | Contact >  
• For information on current fishing conditions in the area | View AZ Game and Fish > or call  928-367-4281
• For Lyman Lake conditions | Learn More > or call 928-337-4441
• For more information, FAQs & HABs resources | View ADEQs HABs > 

How to REPORT a HAB:

To report a HAB to the Arizona Department of Environmental Quality, please download the Arizona Water Watch App | Download >

Status: Confirmed

Benthic HABs have been confirmed in Bright Angel Creek, Roaring Creek, Royal Arch Creek, Matkatamiba Creek, Colorado River at Phantom Ranch, and Shinumo Creek. It is possible that Benthic HABs are present in other streams and rivers throughout Grand Canyon National Park. 

• How to Stay Safe | View PDF > 

Backcountry recreators should take extra precaution when filtering water from streams in Grand Canyon National Park by avoiding areas that appear to have Benthic (subsurface) HABs and avoid disrupting the algal mats to minimize potential risk.

• Visual guide on Identifying Benthic HABs | View Fact Sheet > 
• Utah's Benthic Mats Examples | View Examples >

Status: Unconfirmed

HABs have been reported throughout Lake Havasu. Samples were collected, and the following locations were most recently reported with detections near or above the EPA-recommended recreational threshold for Microcystin;

• Lake Havasu Casino/Hotel Beach
• Nuwuvi Park

While these locations were sampled recently, this does not mean there isn't algae elsewhere in the lake that could be harmful. Campers and Recreators should avoid areas with algae and be mindful that conditions can change daily or even hourly, depending on winds and currents. When in doubt, stay out!

For more information, call: 

• Lake Havasu City Manager's Office at (928) 855-2116
• Lake Havasu State Park at (928) 855-2784
• Bureau of Land Management Lake Havasu Field Office at 928-505-1200

Additional Resources: 

• CA Waterboards FHAB Data Portal | View Portal >  

Status: Confirmed

There is a HAB Danger advisory on Placer Cove, a HAB Warning advisory on Eagle Wash and a HAB Watch on the rest of the Mohave Lake. Please take precautions when recreating and avoid areas that are experiencing an algal bloom.

For current lake conditions, data and more information:

• National NPS information | View Site> 
• Harmful Algal Blooms (U.S. National Park Service) | View Examples >
• Nevada Information | Harmful Algal Blooms | NDEP | View >