Cape Coral, FL Tap Water Quality Report
Last updated November 2026. Here is what testing has found in Cape Coral, Florida tap water, compared with health-based goals (not just the legal limits, which can be much higher). Your exact address may be served by a different system, so check your ZIP code free.
The contaminants furthest above health goals in Cape Coral tap water are Arsenic, Total trihalomethanes (TTHM) and Haloacetic acids (HAA5).
What these contaminants are
- Arsenic: A naturally occurring metal. Long-term exposure is linked to skin, bladder and lung cancer.
- Total trihalomethanes (TTHM): Disinfection byproducts that form when chlorine reacts with organic matter. Long-term exposure is linked to bladder cancer and liver and kidney effects.
- Haloacetic acids (HAA5): Another group of chlorine disinfection byproducts. Long-term exposure above EPA limits is linked to higher cancer risk.
City of Cape Coral
Serves about 172,693 people from groundwater. Public water system ID FL5360325.
13 contaminants detected in recent testing, 7 of them above the health-based goals we compare against.
| Contaminant | Average detected | Health goal | Times the goal | Legal limit | Year |
|---|---|---|---|---|---|
| Arsenic | 1.35 ppb | 0.004 ppb | 338× | 10.0 ppb | 2017 |
| Total trihalomethanes (TTHM) | 26.8 ppb | 1.00 ppb | 27× | 80.0 ppb | 2019 |
| Haloacetic acids (HAA5) | 4.40 ppb | 1.00 ppb | 4.4× | 60.0 ppb | 2019 |
| Haloacetic acids (HAA9) | 4.38 ppb | 1.00 ppb | 4.4× | none | 2019 |
| Chromium-6 | 0.085 ppb | 0.02 ppb | 4.3× | 10.0 ppb | 2014 |
| Strontium | 3,080 ppb | 1,500 ppb | 2.1× | none | 2015 |
| Chlorate | 294 ppb | 210 ppb | 1.4× | none | 2014 |
| Fluoride | 525 ppb | 1,000 ppb | below | 4,000 ppb | 2017 |
| Antimony | 0.35 ppb | 1.00 ppb | below | 6.00 ppb | 2017 |
| Selenium | 3.33 ppb | 30.0 ppb | below | 50.0 ppb | 2017 |
| Barium | 4.42 ppb | 2,000 ppb | below | 2,000 ppb | 2017 |
| Nitrite | 2.12 ppb | 1,000 ppb | below | 1,000 ppb | 2019 |
| Nitrate | 9.76 ppb | 10,000 ppb | below | 10,000 ppb | 2019 |
Tested and not detected: Atrazine, Benzene, Cadmium, Carbon tetrachloride, DBCP, 1,2-Dichloroethane, 1,4-Dioxane, Ethylene dibromide (EDB), Manganese, Mercury, Tetrachloroethylene (PCE), Trichloroethylene (TCE), 1,2,3-Trichloropropane, Thallium, Uranium, Vinyl chloride.
How to filter Cape Coral tap water
- Chlorine and its byproducts in the shower: a 15-stage filtered shower head or universal shower filter is designed to reduce chlorine and chlorine odor where hot water turns it into steam.
- Drinking and cooking water: the 8L stainless steel gravity filter uses carbon filters, needs no plumbing or electricity, and keeps working through Florida storm outages.
- Fluoride: add post-treat fluoride filters to the gravity system.
Run the free tap water check for your ZIP code →
About this data
Results come from testing and annual water quality reports that utilities file with the EPA and the Florida Department of Environmental Protection, compiled in our free water check. Health goals are the stricter of EPA health goals or California public health goals; legal limits are EPA maximum contaminant levels or action levels. Water quality can change between the treatment plant and your home, so these figures are a guide, not a test of your own tap.
Denali Spring is a small water filter company based in Vero Beach, Florida. See all Florida city water reports.