Cherry Creek Park Algae Alert: What Denver Locals Need to Know
The Colorado Department of Public Health and Environment (CDPHE) has issued an advisory for Cherry Creek State Park due to harmful algae blooms. This alert specifically warns park visitors and pet owners about the dangers of contact with the water, which may contain toxins.
Understanding the Algae Bloom Advisory
Recent testing by the CDPHE confirmed the presence of blue-green algae, also known as cyanobacteria, in Cherry Creek Reservoir. These microscopic organisms naturally occur in fresh water but can rapidly multiply under certain conditions, forming visible blooms that pose health risks.
What are Blue-Green Algae and Cyanotoxins?
Blue-green algae are a type of bacteria that photosynthesize like plants. While many forms are harmless, some can produce toxins, called cyanotoxins, which are harmful to humans and animals. These toxins can cause skin irritation, respiratory issues, and gastrointestinal problems in people, and can be severe or even fatal for pets if ingested.
Where is the Advisory in Effect?
The advisory applies to the water body within Cherry Creek State Park. While the entire park remains open for various activities, direct contact with the reservoir’s water, particularly in areas with visible scum or discoloration, should be strictly avoided until the advisory is lifted.
Implications for Park Visitors and Pet Owners
The primary concern is preventing exposure to the potentially toxic water. The CDPHE recommends several precautions to ensure the safety of both people and pets visiting Cherry Creek State Park.
Protecting Yourself and Your Family
Recreational activities on land, such as hiking, biking, and picnicking, are generally safe. However, avoid swimming, wading, or jet skiing in areas with visible algae. If you come into contact with the water, rinse yourself thoroughly with clean water immediately. If symptoms like skin rash, nausea, or respiratory irritation occur after contact, seek medical attention.
Safeguarding Your Pets
Dogs are particularly susceptible to cyanotoxins because they tend to drink from the water and lick their fur after swimming. Pet owners should keep their dogs on leashes and away from the reservoir’s edge. Never allow pets to drink from or swim in areas with suspected algae blooms. If your pet shows symptoms such as vomiting, diarrhea, weakness, difficulty breathing, or seizures after potential exposure, contact a veterinarian immediately.
What to Watch Next and How to Stay Updated
The CDPHE and Colorado Parks and Wildlife (CPW) will continue to monitor the water quality at Cherry Creek State Park. Advisories are typically in place until conditions improve and follow-up testing confirms that toxin levels are no longer a risk. Algae blooms can dissipate quickly or persist for weeks, depending on weather and water conditions.
For the most current information, visitors should check the CDPHE’s harmful algae bloom tracking map online or contact Colorado Parks and Wildlife directly for updates on Cherry Creek State Park. Pay attention to any signage posted at the park entrances or around the reservoir.
Distinguishing Safe Water from Potential Blooms
| Indicator | Typically Safe Water | Potential Algae Bloom Water |
|---|---|---|
| Appearance | Clear, natural water color (blue, brown, green) | Bright green, blue-green, brown, or red; paint-like scum; pea soup appearance |
| Texture | Smooth surface, natural movement | Scummy, foamy, thick mats on surface; may look like spilled paint |
| Odor | Mild, natural earthy scent | Strong, musty, earthy, grassy, or foul smell |
Frequently Asked Questions
- What causes these algae blooms?
Algae blooms are often triggered by warm weather, stagnant water, and an abundance of nutrients like nitrogen and phosphorus, which can come from agricultural runoff or stormwater. - Is it safe to visit other parts of Cherry Creek State Park?
Yes, the park remains open for land-based activities like hiking, biking, picnicking, and camping. The advisory specifically pertains to direct contact with the reservoir water. - How long will the advisory last?
The duration of an advisory varies greatly. Blooms can last days, weeks, or even months, depending on environmental conditions. CDPHE will lift the advisory once toxin levels are consistently low. - What should I do if my pet consumes affected water?
Seek veterinary attention immediately. Symptoms can appear rapidly and include vomiting, diarrhea, lethargy, muscle tremors, and seizures. Time is critical. - Can I still fish or boat in the reservoir?
While fishing and boating might be permitted, it’s crucial to avoid contact with the water and ensure any caught fish are thoroughly cleaned and gutted before consumption. Avoid eating fish skin or organs.
Staying informed and exercising caution are key to enjoying Cherry Creek State Park safely during this advisory period. Prioritize the health of yourself, your family, and your pets by avoiding direct contact with the reservoir’s water where blooms are present.
Cherry Creek Park Algae Alert
