When brushing your teeth, taking a shower, or washing clothes, have you ever thought about where your water comes from, or where it goes once you’ve used it? Understanding the cycle of water use reveals broader human impacts on local ecosystems and the long-term quality and availability of water, making each drop we use part of a larger story. 

The Floridan Aquifer

In Florida, natural and manmade systems both direct the flow of water. One of these systems is critical to the health of human and ecological communities, and it exists right under our feet: the Floridan aquifer.  

The Floridan aquifer is located in the limestone bedrock below the state’s surface, where gaps and caves that have been hollowed out of the rock function as reservoirs for water. Currently, the aquifer provides drinking water for about 90% of Florida’s population, while almost half of the withdrawals from the aquifer also support human life by contributing to industry and agriculture. 

Water fills the aquifer through a process known as aquifer recharge. Florida’s limestone bedrock is porous, which means that it is full of tiny holes that liquids, gases, and small mineral particles can get through. During aquifer recharge, rainwater slowly filters through vegetation, soil, and finally through the limestone, refilling the underground reservoirs with clean water.  

So how does water move from the aquifer to your kitchen sink? Across the state, wells have been drilled deep into the aquifer, and they pump groundwater up to the surface for human use. Check out this map, and you might be able to answer the question of where your water comes from! 

Watersheds and Runoff

Once you know where your water comes from, the next step to mapping your water is to understand where it goes once it’s been used.  

Florida’s natural systems that direct water movement are known as watersheds. A watershed is an area of land that water flows across before collecting in a body of water, such as a stream, river, lake, or even the ocean. Florida has nearly 30 major watersheds, many of which are associated with a river or lake that you might be familiar with.  

When rain hits the ground, some of it instantly begins filtering below the surface to recharge the aquifer, but some rainwater stays aboveground and follows elevation contours as it flows. So, in a natural area, water will tend to flow downhill until it collects at the lowest point, which is typically a water body. 

However, humans impact the natural flow of watersheds by creating impervious surfaces. Impervious surfaces include roofs, roads, parking lots, or any other surfaces that are made of concrete, metal, or plastic and do not allow water to pass through them. Most urban and suburban areas are full of impervious surfaces, and when it rains, these surfaces create what is known as runoff.   

Runoff occurs naturally during or after a rain event, but impervious surfaces significantly increase the amount of runoff by preventing some water from soaking into the ground. This can worsen flooding and create opportunities for runoff water to pick up increased debris and pollutants as it flows.  

When you irrigate your lawn or gutters direct rainwater away from your house, you may be contributing to additional runoff. While many of the processes that create runoff are necessary, increased awareness of where that runoff ends up might help encourage alternative practices, such as building a rain garden, reducing fertilizer and pesticide use, or landscaping with native plants.  

Wastewater Treatment

Not all of your water immediately runs off into a watershed; water from toilets, showers, and other sources that may include human waste must go through additional processing. 

Nearly one-third of Florida homes feature on-site septic systems to process this water. These systems consist of a tank, which holds solid waste while bacteria break it down, and a drain field, which allows liquid waste to slowly leach into the ground. 

For homes without a septic system, wastewater is pumped through pipes and sewers to domestic wastewater treatment facilities. Before being released back into the environment, this water is treated to remove pollutants, nutrients, and harmful microorganisms. Depending on the system, treated water may be discharged into nearby rivers or lakes, used for irrigation, or allowed to filter back into the aquifer.  

This means that the water leaving your home does not simply disappear, but instead replenishes the supply that all Floridians draw from. As a part of the state’s water map, your daily actions can influence water quality, availability, and ecosystem health within the aquifer and throughout your local watershed.  

How Can You Impact Your Water Use Map?

Start by identifying where your water comes from. Do you get your drinking water from a private well or from a municipal supply? If you’re unsure, your local utility company or county website can usually provide this information. From there, try to determine which watershed you live in and what major water bodies are connected to it.   

You can zoom in on your personal water map by observing how water moves across your property. When it rains, where does water collect? Does it flow off your property, and if so, where does it go? Look at a map of your home in context of the broader watershed, and try to predict where the water from your property might end up. Observing these patterns can help you identify areas where runoff may be carrying debris, fertilizer, or pollutants into storm drains or nearby waterways. 

Once you’ve established what your water map looks like, you can start to identify small changes that can make a difference. For example, maybe you can cut back on lawn irrigation to reduce runoff, or regularly check your septic system for proper function.    

You can also take time to explore your local water bodies. Visit a nearby creek, lake, or spring and consider how it connects back to your property. Maybe you enjoy recreating in one of these water bodies, or you know others who do. Identifying tangible connections within the path of water can make your personal actions feel more impactful. 

Mapping the water around you and how you fit into it reveals that you are directly connected to the health of your local waterways, and understanding this interconnectedness creates opportunities to become more informed, responsible stewards of these water systems.