The short answer
What Causes Brown Well Water
When floodwaters rise, they can overflow the top of your well casing or seep through cracks in the concrete seal. Surface water carries mud, clay, and decaying leaves, which settle into the well and give the water a brown tint. Even if the casing looks intact, flooding can push contaminated water into the aquifer below.
Another common cause is a sudden rise in the water table. Heavy rain can stir up naturally occurring iron and manganese from the surrounding soil. These minerals oxidize when exposed to air, producing a rusty brown or orange color. The exact cause depends on your well construction, soil type, and how long the floodwater sat on the ground.
- Surface runoff entering through a cracked or unsealed well cap
- Sediment and silt stirred up by rising groundwater
- Iron and manganese deposits oxidizing after heavy rain
- Organic matter like leaves and animal waste washing in
- A damaged well screen or pump pulling in fine particles
Is Brown Well Water Safe
Brown water from a flooded well is not safe to drink, cook with, or bathe in until you know what is in it. Floodwater can carry bacteria, viruses, and chemicals from septic systems, farm fields, or roads. Even if the water clears up after a few days, contaminants may still be present.
Boiling the water kills bacteria but does not remove sediment, iron, or chemical pollutants. You should use bottled water for drinking and brushing teeth until a lab test confirms the water is safe. If you feel unwell after using the water, see a doctor and mention the flood exposure.
Steps to Take Right Now
Stop using the well water for any household purpose, including laundry and dishwashing, because sediment can clog pipes and appliances. Turn off the pump to prevent drawing more contaminated water into your plumbing. If you live in Daytona Beach, keep a written note of your shutoff valve location so you can act quickly during future storms.
Contact a local water testing lab to get a sample tested for coliform bacteria, E. Coli, nitrates, and heavy metals. Do not rely on taste, smell, or color alone to judge safety. While you wait for results, use bottled water and avoid any skin contact with the brown water, especially for children or anyone with open wounds.
Cleaning and Disinfecting Your Well
After the floodwater recedes, you will need to clean the well before using it again. This usually involves pumping out the standing water, scrubbing the inside of the casing, and flushing the system. The pros can handle this safely, as they have the equipment to remove sediment and disinfect the entire water supply.
Shock chlorination is a common method where a strong chlorine solution is circulated through the well and plumbing, then flushed out. This kills bacteria but does not remove dissolved iron or sediment. You may need additional filtration, such as a sediment filter or an iron removal system, depending on your test results.
- Pump out all standing water from the well
- Scrub the well casing to remove biofilm and mud
- Flush the system with clean water before testing again
- Shock chlorinate to kill bacteria, then retest
- Install a sediment filter to catch remaining particles
When to Call the Pros
If the brown color does not clear after basic flushing, or if your water test shows high levels of bacteria or chemicals, you need professional help. The pros can assess your well construction, identify entry points, and recommend the right treatment. They also have pumps and tanks to handle large volumes of contaminated water.
Flooded wells can also damage your pump, wiring, and pressure tank. A local water damage pro can inspect your system and coordinate with a well driller if repairs are needed. Do not attempt to enter a flooded well or handle electrical components yourself, as that poses serious safety risks.
Water damage does not wait
Call (386) 272-5697 any time, day or night, and describe what happened.
Call Now (386) 272-5697Frequently asked questions
How long until my well water is clear again?
It depends on the extent of flooding and your well depth. After cleaning and disinfecting, you may need to flush the system for several hours or days. Retest the water after the work is done to confirm it is safe before regular use.
Can I boil brown well water to make it safe?
Boiling kills bacteria but does not remove sediment, iron, or chemicals. The brown color may remain, and harmful contaminants like nitrates or pesticides will still be present. Use bottled water until a lab test shows the water is safe.
Will my insurance cover well water damage?
Policies vary, and your insurer decides what is covered. Flood damage to a well is often excluded under standard homeowners policies, but a separate flood policy may help. Check your policy and contact your insurance company to ask about coverage for testing and repairs.