**Austin Algae: Is City Filtering Crashing Biome Youth?**

By Franklin Everett Shaw

November 7, 2025

The tap water in Austin tastes…different. It’s not just your imagination. The city’s ongoing battle with algal blooms in Lady Bird Lake and Lake Austin is forcing changes in water treatment, and these changes could be impacting your gut health, especially if you’re over 50 and have called Austin home for a while.

Austin’s water filtration system is constantly adapting to combat the ever-present threat of algae. These blooms, fueled by runoff and warmer temperatures, release compounds like geosmin and 2-methylisoborneol (MIB), which, while not necessarily harmful, give the water an earthy or musty taste and odor.

The city’s response involves adjusting the levels of chlorine and other disinfectants, and sometimes adding activated carbon to absorb the offending compounds. This is where the potential problem for long-term residents, particularly those over 50, arises.

Our gut microbiome, a complex ecosystem of bacteria, fungi, and other microorganisms, is incredibly sensitive to environmental changes. Chlorine, while effective at killing harmful bacteria in the water supply, can also disrupt the delicate balance of our gut flora.

Think of it like this: you’re carpet-bombing a garden to get rid of weeds. You might kill the weeds, but you’ll also damage the flowers.

For younger individuals, the gut microbiome is generally more resilient and can recover more quickly from these disruptions. However, as we age, our gut microbiome becomes less diverse and less adaptable. This makes older adults more vulnerable to the negative effects of changes in water treatment.

A less diverse gut microbiome is linked to a range of health problems, including:

• Weakened immune system
• Increased inflammation
• Digestive issues like bloating and constipation
• Increased risk of chronic diseases like heart disease and type 2 diabetes

So, what can long-term Austin residents over 50 do to protect their gut health in the face of these water treatment changes? Dietary interventions are key.

Probiotics are live microorganisms that, when consumed in adequate amounts, can confer a health benefit on the host. They can help to replenish beneficial bacteria in the gut and restore balance to the microbiome.

Not all probiotics are created equal. Different strains of bacteria have different effects on the body. For example, Lactobacillus rhamnosus GG is a well-studied strain that has been shown to improve gut barrier function and reduce inflammation. You can find supplements containing this strain at most retailers in Texas, including HEB and Whole Foods Market.

Another beneficial strain is Bifidobacterium longum. This strain can help to improve digestion and boost the immune system. Look for probiotic supplements that contain a blend of different strains, including Lactobacillus and Bifidobacterium species.

Beyond probiotics, prebiotics are also important for gut health. Prebiotics are non-digestible fibers that feed the beneficial bacteria in our gut. Good sources of prebiotics include:

• Onions
• Garlic
• Leeks
• Asparagus
• Bananas
• Oats

Incorporating these foods into your diet can help to support the growth of beneficial bacteria and improve gut health.

Now, let’s address the anecdotal reports of accelerated aging in long-time Austin residents. While there’s no definitive scientific evidence to support this claim, it’s worth exploring the potential link between water treatment changes and aging.

One possible explanation is that chronic inflammation, driven by gut microbiome dysbiosis, could contribute to accelerated aging. Inflammation is a major driver of age-related diseases like heart disease, Alzheimer’s disease, and cancer.

Another factor to consider is hydration. While Austin’s tap water is safe to drink, some residents may find the taste unpalatable due to the algal bloom-related compounds. This could lead to decreased water consumption, which can have negative consequences for overall health and aging.

Dehydration can lead to:

• Fatigue
• Headaches
• Constipation
• Reduced cognitive function
• Increased risk of kidney stones

To combat this, consider alternative hydration strategies. Locally sourced spring water is a great option. Several companies in the Austin area offer delivery services for spring water sourced from nearby aquifers. This water is naturally filtered and free from the chemicals used in municipal water treatment.

For example, you could look into water from springs near Dripping Springs, TX.

Another option is to invest in a high-quality water filter that removes chlorine and other contaminants. Look for filters that are certified by NSF International to remove chlorine, chloramine, and other harmful substances.

It’s also important to note that the city of Austin is constantly working to improve its water treatment processes. They are exploring new technologies to remove algal bloom-related compounds without relying on harsh chemicals.

However, until these new technologies are fully implemented, it’s up to individual residents to take proactive steps to protect their gut health and overall well-being.

Here’s a step-by-step guide to mitigating the potential harm from Austin’s water treatment:

1. Assess your risk: Are you over 50 and a long-term Austin resident? If so, you’re at higher risk.
2. Consider a probiotic supplement: Choose a supplement containing Lactobacillus rhamnosus GG and Bifidobacterium longum. Start with a low dose and gradually increase it as tolerated.
3. Eat prebiotic-rich foods: Incorporate onions, garlic, leeks, asparagus, bananas, and oats into your diet.
4. Explore alternative hydration strategies: Consider locally sourced spring water or a high-quality water filter.
5. Stay hydrated: Drink plenty of water throughout the day, even if you don’t feel thirsty.
6. Monitor your health: Pay attention to any changes in your digestion, energy levels, or overall well-being. Consult with your doctor if you have any concerns.

One common mistake developers make when thinking about water quality is assuming that “safe” equals “optimal.” Just because the water meets regulatory standards doesn’t mean it’s necessarily the best choice for your long-term health, especially considering the delicate balance of your gut microbiome.

Another pitfall is relying solely on anecdotal evidence. While personal experiences can be valuable, it’s important to back them up with scientific research. Don’t assume that everyone in Austin is experiencing accelerated aging due to the water.

Finally, don’t underestimate the power of lifestyle factors. Diet, exercise, sleep, and stress management all play a crucial role in gut health and overall well-being. Addressing these factors can help to mitigate the potential negative effects of water treatment changes.

In conclusion, while Austin’s municipal water is safe, the changes in treatment protocols to combat algal blooms may have unintended consequences for the gut health of long-term residents, particularly those over 50. By taking proactive steps to support your gut microbiome and stay hydrated, you can mitigate these potential risks and maintain your overall well-being. Don’t just accept the status quo; take control of your health and make informed choices about your water consumption.