CAPE CORAL DRINKING WATER

Cape Coral Municipal Drinking Water Safety Report (March 2026)

Cape Coral’s municipal drinking water is supplied by the City of Cape Coral Utilities Department and serves approximately 163,000–163,687 residents through two reverse osmosis (RO) treatment plants (North and Southwest). The water is drawn from the Upper Floridan Aquifer via 56 deep wells (700–800 feet) tapping brackish groundwater with total dissolved solids around 3,000 ppm. This aquifer is considered sufficient for future growth, with recharge primarily in north-central Florida; the water is estimated to be over 10,000 years old.

Treatment Process

Raw groundwater undergoes pretreatment (sulfuric acid and scale inhibitor), cartridge filtration, high-pressure RO (rejecting 98–99% of dissolved solids, salts, bacteria, radionuclides, and organics), blending with a small percentage of raw water for stability and corrosion control, degasification to remove hydrogen sulfide (preventing “rotten egg” odor), chlorination for disinfection, and caustic soda for pH adjustment. Concentrate (about 20%) is disposed via deep injection well. The finished water is moderately hard and chlorine-disinfected.

Official Compliance and Safety Status (2024 Consumer Confidence Report)

The latest available annual Consumer Confidence Report (CCR), covering calendar year 2024 and published in May 2025, states unequivocally:
“The City of Cape Coral’s drinking water meets all federal and state drinking water standards.”
“The City of Cape Coral’s tap water meets state and federal standards for both appearance and safety.”

No Maximum Contaminant Level (MCL) violations occurred. The city has earned reduced monitoring frequencies for many contaminants due to consistent compliance. All required testing (January–December 2024, with some analytes from prior years) showed results well within EPA and Florida DEP limits. Lead and copper 90th-percentile levels at customer taps are well below the 15 ppb action level for lead.

Key Detected Contaminants (2024 CCR data)
Data are reported at point-of-entry for each RO plant unless noted. All values are below MCLs.

Radioactive Contaminants (natural erosion of deposits):

• Southwest RO: Alpha emitters 2.8 pCi/L (MCL 15, MCLG 0); Combined radium 2.7 pCi/L (MCL 5, MCLG 0)
• North RO: Alpha emitters 3.7 pCi/L; Combined radium 3.7 pCi/L

Inorganic Contaminants:

• Barium: 0.0044–0.0065 ppm (MCL 2, MCLG 2)
• Fluoride: 0.46–0.84 ppm (MCL 4, MCLG 4)
• Sodium: 86 ppm (no enforceable MCL; EPA advisory ~160 ppm) — from saltwater intrusion/leaching
• Nitrate (as N): 0.013 ppm (MCL 10, MCLG 10)

Disinfectants & Byproducts:

• Chlorine (residual): Average 1.34 ppm, range 0.21–3.0 ppm (MRDL 4, MRDLG 4)
• Haloacetic acids (HAA5): Average 5.70 ppb, range 2.70–9.88 ppb (MCL 60)
• Total trihalomethanes (TTHMs): Average 33.47 ppb (MCL 80; 2023 quarterly data reported in 2024 CCR)

Lead & Copper: 90th-percentile results “well below” EPA action levels (tested at customer taps). Lead not detected at plant entry points.

Not Detected (extensive list from 2024 testing): Antimony, arsenic, asbestos, beryllium, cadmium, mercury, nitrate/nitrite (in some locations), selenium, thallium, dozens of pesticides/herbicides (e.g., atrazine, glyphosate), volatile organic compounds (e.g., benzene, TCE), synthetic organics, PCBs, dioxin, and many more. No detections of regulated contaminants in these categories.

Independent/Third-Party Assessments

Sites using stricter non-enforceable health guidelines (e.g., MCLGs often set at zero or one-in-a-million cancer risk levels) flag concerns:

• Environmental Working Group (EWG): Water was in “serious violation of federal health-based drinking water standards” in Q2 2024 (April–June) per their analysis. Five contaminants exceeded EWG guidelines: hexavalent chromium (0.0850 ppb, 4.3× guideline), HAA5 (5.93 ppb, 59×), HAA9 (4.38 ppb, 73×), combined radium (3.15 pCi/L, 63×), and TTHMs (29.9 ppb, 200×). These are linked to potential long-term cancer risks in EWG’s peer-reviewed models. No PFAS exceeded guidelines (tested but not detected). EWG recommends RO filtration. Legal EPA MCLs are met, but EWG notes legal limits “do not necessarily equal safe.”
• TapWaterData.com: Five contaminants above EPA MCLGs (including chromium-6 and radium); notes 8 MCL violations (likely monitoring/reporting rather than health exceedances) and recommends certified filters. Hardness is moderately hard (~103 ppm in related analyses).

These exceedances reflect natural groundwater minerals (radium, chromium-6) and disinfection byproducts, which are common in chlorinated systems but controlled below legal limits.

PFAS (“Forever Chemicals”)

No PFAS contaminants were detected or flagged above guidelines in the 2024 CCR or EWG data. EPA’s 2024 PFAS rule (MCLs for PFOA, PFOS at 4 ppt, others at 10 ppt or hazard index) requires compliance by 2029 (possible extension to 2031 under recent proposals). Florida DEP is handling monitoring; Cape Coral has no reported violations or elevated levels in available public data. Statewide spring/surface water studies show some PFAS presence in Florida, but not specifically elevated in Cape Coral’s treated supply.

Resident Drinking Water Complaints

Complaints focus overwhelmingly on supply and quantity, not chemical quality:

• Ongoing drought and rapid growth have depleted the Mid-Hawthorn Aquifer (northern Cape Coral/Lee County), leading to critical levels, conservation mandates, irrigation restrictions, and concerns about long-term groundwater sustainability (news reports 2025–2026). Residents worry about wells running dry and future shortages.
• Isolated quality comments appear on social media (e.g., Facebook: “tap water is not even remotely drinkable,” occasional yellow water attributed to old pipes, taste/odor notes). No widespread reports of brown water, chemical contamination, or health outbreaks. X (Twitter) mentions reference supply crises more than taste/smell. A 2024 YouTube report mentioned “contamination concerns” amid shortages, but tied to quantity issues rather than regulated contaminants. No major news of boil-water notices or quality violations in 2024–2026.

Conclusion and Recommendations

Cape Coral’s municipal drinking water is safe to drink under all EPA and Florida DEP standards, with no MCL violations in the latest official report. Treatment via RO effectively removes most contaminants, and rigorous testing confirms compliance.

For residents concerned about taste (chlorine, moderate hardness, or residual sulfur notes), long-term disinfection byproducts, or stricter health guidelines (per EWG), a certified under-sink or whole-house filter (especially reverse osmosis) is recommended and effective against the flagged parameters. Annual CCRs are available on the city website (capecoral.gov); contact Utilities at 239-574-7722 for questions or testing. Source-water protection is strong, with low susceptibility ratings.

Continue monitoring future CCRs (2025 report expected mid-2026) and PFAS compliance updates. The city’s commitment to advanced treatment supports reliable, high-quality tap water.

Comparison of Cape Coral Municipal Drinking Water Safety to Nearby Florida Cities (as of March 2026)

Cape Coral’s drinking water, sourced from the Upper Floridan Aquifer and treated primarily via reverse osmosis (RO), remains compliant with all EPA and Florida DEP standards, with no Maximum Contaminant Level (MCL) violations reported in the 2024 Consumer Confidence Report (CCR). Nearby cities in Southwest Florida (Lee and Collier Counties) — including Fort Myers, Naples, Bonita Springs, and Punta Gorda — draw from similar groundwater sources (often the Floridan Aquifer system) and face comparable natural contaminants like radionuclides, hexavalent chromium, and disinfection byproducts from chlorination. All major systems meet federal legal limits, but third-party assessments (e.g., Environmental Working Group — EWG) highlight exceedances of stricter non-enforceable health guidelines.

Key Comparison Metrics

All cities comply with EPA MCLs, but EWG flags contaminants above its health guidelines (often set at levels for negligible long-term risk, e.g., one-in-a-million cancer risk). Common issues include disinfection byproducts (TTHMs, HAA5), hexavalent chromium (from natural sources), and radionuclides (radium/alpha emitters from aquifer geology). PFAS detections remain low or absent in reported data across these areas.

EWG Tap Water Database Insights (latest available data, 2013–2024):

• Cape Coral (City of Cape Coral, serves ~163,647): In “serious violation” per EWG (Q2 2024 analysis), with 5 contaminants exceeding guidelines (e.g., hexavalent chromium 0.085 ppb [4.3× guideline], HAA5 5.93 ppb [59×], TTHMs 29.9 ppb [200×], combined radium 3.15 pCi/L [63×]). No PFAS exceedances.
• Fort Myers (City of Fort Myers Water Treatment Plant, serves ~92,219; also Lee County Utilities for broader areas): Compliant with federal standards; EWG notes compliance in recent quarters, but some sources flag 2 contaminants above MCLGs (e.g., disinfection byproducts, natural minerals). TapWaterData reports 2 above health guidelines.
• Naples (Naples Water Department/Collier County Regional, serves ~72,000–171,000): In “serious violation” per EWG, with 11 contaminants exceeding guidelines (e.g., hexavalent chromium 0.293 ppb [15×], TTHMs 20.7 ppb [207×], HAA5 higher levels). TapWaterData notes 11 above MCLGs, higher than Cape Coral in some metrics.
• Bonita Springs (Bonita Springs Utilities, serves ~74,270): Compliant with federal health-based standards per EWG (no “serious violation” flagged in recent data).
• Punta Gorda (City of Punta Gorda, serves ~36,302): Limited specific EWG flags in searches, but shares regional aquifer challenges; no major violations noted in available reports.

Official CCR Highlights (2024 data where available):

• Cape Coral: RO treatment removes 98–99% of contaminants; low disinfection byproducts (HAA5 avg. 5.70 ppb, TTHMs 33.47 ppb); radium/alpha emitters low (2.7–3.7 pCi/L); sodium ~86 ppm.
• Fort Myers / Lee County: Groundwater/surface blends; chlorine residual ~2–3 ppm; disinfection byproducts higher in some areas (e.g., TTHMs up to annual averages below 80 ppb MCL but occasional spikes); low inorganics like arsenic/lead.
• Naples: Groundwater; higher reported disinfection byproducts and hexavalent chromium in EWG data; no MCL violations but more guideline exceedances.
• Bonita Springs: Similar groundwater; strong compliance record.
• Punta Gorda: Groundwater; generally compliant, with regional similarities to Cape Coral.

Other Notes:

• Cape Coral’s advanced RO process often results in lower overall contaminants compared to non-RO systems (e.g., some Fort Myers or Naples areas rely more on conventional treatment).
• Local sources praise Cape Coral’s taste — it won the 2025 Florida Section AWWA Region V Best Tasting Drinking Water Award.
• Resident complaints in the region focus more on supply/shortages (drought, growth) than quality, though isolated taste/odor issues occur everywhere.
• No widespread PFAS issues reported in these Southwest Florida systems under current EPA rules.

Summary Table: Relative Safety Profile (Based on Compliance & Third-Party Assessments)

City/Area	EPA/DEP Compliance	EWG “Serious Violation” Flag	Key Guideline Exceedances (EWG/TapWaterData)	Treatment Type	Overall Notes
Cape Coral	Yes (no violations)	Yes (2024)	5 (radium, Cr-6, DBPs)	Reverse Osmosis	Strong RO removal; best taste award; moderate hardness.
Fort Myers	Yes	No (recent)	2	Groundwater blend	Good compliance; similar regional risks.
Naples	Yes	Yes	11	Groundwater	More exceedances in third-party data; higher Cr-6/TTHMs.
Bonita Springs	Yes	No	Fewer/low	Groundwater	Strong record; low flags.
Punta Gorda	Yes	Limited data	Regional similarities	Groundwater	Compliant; aquifer-shared issues.

Conclusion – Cape Coral Drinking Water

Cape Coral’s municipal water is among the safer options in Southwest Florida due to its RO treatment, which effectively reduces many natural and byproduct contaminants compared to nearby systems. It outperforms Naples in fewer EWG guideline exceedances and matches or exceeds Fort Myers/Bonita Springs in compliance and taste perception. All are safe under legal standards, but if concerned about long-term low-level risks (e.g., disinfection byproducts or natural radionuclides), point-of-use filters (certified RO or activated carbon) remain a common recommendation region-wide. Check each city’s latest CCR (available on municipal websites) for 2025 data, expected mid-2026. Contact local utilities for specific testing or concerns.

Detailed Overview of Reverse Osmosis (RO) Treatment in Cape Coral’s Municipal Drinking Water

Cape Coral’s drinking water is treated exclusively using reverse osmosis (RO) at two plants: the Southwest RO Water Treatment Plant (expanded to 18 million gallons per day, or MGD, the oldest continuously operating large-scale RO facility in the world since 1977) and the North Cape Coral RO Water Treatment Plant (12 MGD, with ongoing expansions). These plants process brackish groundwater from the Upper Floridan Aquifer (drawn from deep wells ~450–850 feet deep, with total dissolved solids ~2,000–3,000 ppm) to produce high-quality potable water. The combined capacity is 30 MGD, serving the city’s ~163,000+ residents.

RO is a pressure-driven membrane filtration process that reverses natural osmosis. In natural osmosis, water moves from low-solute to high-solute areas through a semi-permeable membrane. RO applies high pressure (often 200–400 psi in low-pressure systems like Cape Coral’s) to force water from the high-solute (brackish) side through the membrane, leaving dissolved salts, minerals, and contaminants behind. This produces purified “permeate” water and a concentrated “reject” or “concentrate” stream (about 20% of input volume in Cape Coral), which is disposed via deep injection wells.

Step-by-Step RO Treatment Process in Cape Coral

The process is similar at both plants, with minor variations:

1. Raw Water Intake and Pretreatment
   Brackish groundwater enters the plant.

• Sulfuric acid is injected to lower pH (to ~5.8) and prevent scaling.
• A scale inhibitor (e.g., polyacrylic acid, ~3 ppm) is added to protect membranes from mineral buildup.
• Water passes through 5-micron cartridge filters (like pool filters) to remove sand, silt, particulates, and other solids that could damage membranes.

1. High-Pressure Pumping and Reverse Osmosis
   Pretreated “feed water” is pumped at high pressure into RO “trains” (parallel units).

• The North Plant has four trains (each ~2.5–3 MGD, with 600-hp pumps and variable-frequency drives).
• Water flows across spiral-wound thin-film composite low-pressure/high-rejection membranes (multi-stage: e.g., first stage with more vessels, second stage using concentrate as feed).
• RO rejects 98–99% of dissolved solids (salts), color, bacteria, viruses, radionuclides (e.g., radium, alpha emitters), organics, inorganics, and other contaminants.
• Permeate (product water) has TDS ~100 ppm; concentrate (~20% of feed) is sent to disposal.

1. Blending for Stability
   Pure RO permeate is blended with a small percentage (~14–20%) of raw water to raise TDS to ~350 ppm, add minerals (for moderate hardness/alkalinity), improve taste, and enhance corrosion control in pipes.
2. Degasification (Hydrogen Sulfide Removal)
   Blend water enters degasifiers (packed towers with blowers).
   Air strips out hydrogen sulfide gas (causing “rotten egg” odor), which exits via a tower. Residual H₂S is addressed later.
3. Final Disinfection and pH Adjustment
   Water flows to a clearwell.

• Chlorine (sodium hypochlorite) is added for disinfection and residual protection in distribution.
• Caustic soda (sodium hydroxide) raises pH to ~8.8 for corrosion control.
  Finished water is stored and pumped to the distribution system.

Key Benefits and Effectiveness

• Contaminant Removal: RO effectively removes salts, heavy metals (e.g., lead, arsenic if present), fluoride, nitrates, PFAS (in many cases), disinfection byproducts precursors, bacteria/viruses, and natural radionuclides common in Florida aquifers.
• Compliance and Quality: Produces water meeting/exceeding EPA/FDEP standards; low levels of regulated contaminants (as detailed in prior reports).
• Taste Award: Cape Coral’s RO-treated water won the 2025 Florida Section AWWA Region V Best Tasting Drinking Water Award, thanks to controlled blending and treatment.

Limitations and Notes

• RO permeate is very pure (low TDS/minerals), so blending prevents “aggressive” water that could corrode pipes.
• Concentrate disposal via injection wells is environmentally managed.
• Membranes require periodic cleaning/replacement; plants are designed for expansion (e.g., North Plant to 18–36 MGD potential).

This advanced RO process makes Cape Coral’s tap water among the cleanest in Southwest Florida, far superior to untreated brackish sources. For home concerns (e.g., taste from chlorine or residual hardness), under-sink RO filters are popular among residents. Check the city’s website (capecoral.gov) for tours, videos of the North RO Plant, or the latest Consumer Confidence Report for updates. Contact Utilities at 239-574-7722 for specifics.

All City Voters Participate in the Open Races Regardless of Which District They Live In.

If you are a registered voter in Cape Coral, you will see all three district races (1, 4, and 6) on your ballot. You can vote for one candidate in District 1, one in District 4, and one in District 6 — even if you don’t live in those districts.