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DRINKING WATER QUALITY

Cape Coral, Florida’s Drinking Water Comes Primarily from Groundwater (the Upper Floridan Aquifer).

The city treats it at two reverse osmosis (RO) plants: the Southwest RO Plant (the oldest continuously operating RO facility in the world, expanded over time) and the North RO Plant. RO treatment effectively removes salts, minerals, and many contaminants, making it suitable for potable use in this coastal area prone to saltwater intrusion. The city has relied fully on RO since abandoning lime softening decades ago.

Official Compliance and Summary (City Reports)

The City of Cape Coral publishes an annual Consumer Confidence Report (CCR), also called the Annual Drinking Water Quality Report. These reports consistently state that the drinking water meets or surpasses all federal (EPA) and state (Florida DEP) drinking water standards. No violations of regulated maximum contaminant levels (MCLs), maximum residual disinfectant levels (MRDLs), or action levels (ALs) are reported in recent years (including 2023 and 2024 data). The city has reduced monitoring frequency for many contaminants due to long-term consistent compliance.

Key points from city CCRs:

  • Disinfectant: Chlorine is added (average around 1.3 ppm in one recent year, range 0.95–3.2 ppm; MRDL 4 ppm). It controls microbes.
  • Disinfection byproducts (e.g., haloacetic acids/HAA5): Low levels detected (e.g., average ~7 ppb in one year, well below MCL of 60 ppb).
  • Lead and Copper (tested at customer taps):
  • Lead: 90th percentile ~1–1.4 ppb (well below EPA action level of 15 ppb).
  • Copper: 90th percentile ~0.034 ppm (well below action level of 1.3 ppm).
  • Other inorganics (e.g., fluoride, nitrates): Detected at low levels below MCLs (nitrates often ~1–2 ppm vs. MCL 10 ppm; fluoride ~0.65–0.8 ppm vs. MCL 4 ppm).
  • Radionuclides (from older data in reports): Combined radium and alpha emitters detected but below MCLs.
  • Many other contaminants (including various organics and inorganics) were not detected in required testing.

The city emphasizes rigorous testing and advanced treatment. Cape Coral has even won awards for best-tasting drinking water in Southwest Florida (e.g., 2025 regional award).

You can view the full reports directly on the city’s website:

Contact Cape Coral Utilities (239-574-7722) for questions or specific tap sampling.

Third-Party Perspectives and Health Guidelines

While the water complies with legal EPA limits (which have not been updated for many contaminants in decades), independent analyses apply stricter health-based guidelines:

  • The Environmental Working Group (EWG) database (using utility data from 2014–2023) flags several contaminants exceeding EWG’s more conservative guidelines, including:
  • Haloacetic acids (HAA5 and HAA9): Byproducts of disinfection; detected levels significantly above EWG guidelines (potential cancer risk).
  • Total trihalomethanes (TTHMs): Another disinfection byproduct; notably higher than EWG guideline.
  • Radium (combined): Naturally occurring from groundwater; exceeds EWG guideline.
  • Chromium (hexavalent): Low levels but above EWG guideline.
  • Others like chlorate.

EWG notes that legal compliance does not always mean the water is free of health concerns under their stricter (non-enforceable) benchmarks and has mentioned a “serious violation” assessment for one recent quarter (April–June 2024) in their review of federal standards compliance.

Other sites (e.g., some water filter companies) note 5–9 contaminants detected, with a few above certain advocacy guidelines, often recommending additional home filtration for peace of mind, especially for hardness, radium, or disinfection byproducts. However, official testing shows no exceedances of enforceable limits.

Cape Coral’s groundwater source can naturally contain minerals and radionuclides, but RO treatment reduces many of these effectively.

Practical Considerations for Residents

  • Is it safe to drink? According to EPA and Florida standards: Yes. The city reports full compliance.
  • Taste/Hardness: RO water is generally low in minerals (soft), but some residents may notice chlorine taste or add remineralization filters. The city has won taste awards.
  • Lead risk: Very low in city testing, but older homes (pre-1986) could have lead in private plumbing—flush taps if concerned.
  • Home filtration: Optional for those wanting to reduce disinfection byproducts, chlorate, or trace contaminants further (e.g., activated carbon or RO systems). Test your tap if you have specific health concerns.
  • Private wells (if applicable outside city service): Test separately, as they are not covered by city reports.

For the most current details, download the latest 2024 CCR from the city site, as it includes the specific tables of detected levels, ranges, and compliance data. Water quality can vary slightly year to year but has remained compliant.

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