This webpage is updated monthly with information provided by Zion National Park. The Utah Division of Water Quality does not routinely conduct HAB sampling within the Virgin River Watershed. If you have additional questions, please contact Zion National Park by calling (435) 772-3256.
This webpage is updated with information provided by Zion National Park.
Updates
Lower Virgin River:
Health Watch
Monitoring for harmful algae on October 6, 2024
Harmful algae mats (benthic cyanobacteria) may be present at multiple locations along the lower Virgin River (Springdale to Bloomington). Take caution when entering the water and recreating. If a harmful algae mat is present, avoid touching or disturbing it and keep pets and children away. Avoid primary contact recreation (swimming and submerging the head) in areas with visible harmful algae mats. Do not drink in-stream water or allow pets to do so. Learn how to identify a harmful algae mat.
North Creek (including “The Subway”):
Warning Advisory
Monitoring for harmful algae on October 1, 2024
Harmful algae mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algae mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
North Fork of Virgin River (including “The Narrows”):
Warning Advisory
Monitoring for harmful algae on October 1, 2024
Harmful algae mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algae mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
La Verkin Creek:
Health Watch
Monitoring for harmful algae on October 2, 2024
Harmful algae mats (benthic cyanobacteria) may be present. Avoid touching or disturbing algae mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
Lower Virgin River:
Health Watch
Monitoring for harmful algae on July 18, 2024
Harmful algae mats (benthic cyanobacteria) may be present at multiple locations along the lower Virgin River (Springdale to Bloomington). Take caution when entering the water and recreating. If a harmful algae mat is present, avoid touching or disturbing it and keep pets and children away. Avoid primary contact recreation (swimming and submerging the head) in areas with visible harmful algae mats. Do not drink in-stream water or allow pets to do so. Learn how to identify a harmful algae mat.
North Creek (including “The Subway”):
Warning Advisory
Monitoring for harmful algae on November 8, 2023
Harmful algal mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algal mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
North Fork of Virgin River (including “The Narrows”):
Warning Advisory
Monitoring for harmful algae on November 8, 2023
Harmful algae mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algae mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
La Verkin Creek:
Health Watch
Monitoring for harmful algae on November 8, 2023
Harmful algae mats (benthic cyanobacteria) may be present. Avoid touching or disturbing algae mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
Lower Virgin River:
Looks Good
Monitoring for harmful algae on June 3, 2024
Our monitoring team did not see any visible signs of harmful algae mats (benthic cyanobacteria) at the recreational sites they visited. However, mats may be present at other sites or regrow before our next visit. Know what to look for and check before letting children or pets in the water.
Sites visited: Confluence Park at SR-9 trailhead, Fossil Falls Park, Man O’War trailhead
Lower Virgin River:
Health Watch
Monitoring for harmful algae on March 14, 2024
Harmful algal mats (benthic cyanobacteria) may be present at multiple locations along the lower Virgin River (Springdale to Bloomington). Take caution when entering the water and recreating. If a harmful algal mat is present, avoid touching or disturbing it and keep pets and children away. Avoid primary contact recreation (swimming and submerging the head) in areas with visible harmful algal mats. Do not drink in-stream water or allow pets to do so. Learn how to identify a harmful algal mat.
Lower Virgin River:
Health Watch
Monitoring for harmful algae on November 8, 2023
Harmful algal mats (benthic cyanobacteria) may be present at multiple locations along the lower Virgin River (Springdale to Bloomington). Take caution when entering the water and recreating. If a harmful algal mat is present, avoid touching or disturbing it and keep pets and children away. Avoid primary contact recreation (swimming and submerging the head) in areas with visible harmful algal mats. Do not drink in-stream water or allow pets to do so. Learn how to identify a harmful algal mat.
North Creek (including “The Subway”):
Warning Advisory
Monitoring for harmful algae on November 8, 2023
Harmful algal mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algal mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
North Fork of Virgin River (including “The Narrows”):
Warning Advisory
Monitoring for harmful algae on November 8, 2023
Harmful algal mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algal mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
La Verkin Creek:
Health Watch
Monitoring for harmful algae on November 8, 2023
Harmful algal mats (benthic cyanobacteria) may be present. Avoid touching or disturbing algal mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
North Fork of Virgin River (including “The Narrows”):
Warning Advisory
Monitoring for harmful algae on November 8, 2023
Harmful algal mats (benthic cyanobacteria) are present and producing toxins. Avoid touching or disturbing algal mats. Avoid primary contact recreation (swimming and submerging the head) when recreating in this area. Do not drink in-stream water anywhere in the park. If you must filter water, do so directly from a spring source.
