Is Grand Island, FL Tap Water Safe to Drink?
Graded B-, with 16 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
72.4/100
waterverge.com Grand Island, FL — Water Quality Report
Grand Island's drinking water received a grade of B- (72.4 out of 100), indicating fair water quality. The city's 4 water systems serve approximately 2,341 residents using groundwater.
Lead levels were measured at 1.4 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 60 violations on record, including 4 health-based violations. 16 remain unresolved.
What to know about Grand Island's water
Grand Island ranks #213 out of 388 cities in Florida for water quality, placing it below average in the state.
Grand Island relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Grand Island may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 10 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Grand Island, FL water safe to drink?
Grand Island's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (72.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 4 water systems serve approximately 2,341 residents using groundwater (wells).
Recent water quality updates for Grand Island
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Grand Island's water quality assessment. Grade: B- (72.4/100).
Contaminants: Revised Total Coliform Rule, E. COLI.
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Revised Total Coliform Rule, E. COLI.
Federal disaster declaration (FEMA DR-4834). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3622). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Grand Island's water supply.
Well within EPA limits.
Violation history
Grand Island's water system has 60 total violations on record, including 4 health-based violations. 16 remain unresolved. 10 violations were issued in the last 5 years.
Flood & environmental risk
Lake County has experienced 10 federally declared disasters since 2016. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Palatlakaha R, Wolf Branch, Haynes Creek, Haynes Creek Below Burrell Dam.
Where does Grand Island's water come from?
Grand Island's drinking water comes from groundwater (wells), supplied by 4 water systems serving approximately 2,341 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Palatlakaha R (river), Wolf Branch (river), Haynes Creek (river), Haynes Creek Below Burrell Dam (river).
What Grand Island residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Grand Island's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Grand Island's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Flood & disaster history
Lake County has experienced 10 federally declared disasters since 2016. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 1.4 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Grand Island compares by contaminant
Explore where Grand Island ranks among all Florida cities for specific contaminants.
Water source & infrastructure
Where Grand Island's water comes from
Grand Island's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by public/private ownership and serves approximately 2,341 people through 4 water systems.
Water bodies near Grand Island
Grand Island is located near 4 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Grand Island
| System Name | PWSID | Population | Source |
|---|---|---|---|
| WEDGEWOOD SUBDIVISION | FL3354701 | 980 | GW |
| SUNLAKE ESTATES | FL3351555 | 751 | GW |
| GRAND ISLAND RESORT MHP (2 WPS) | FL3350172 | 480 | GW |
| BRENDENWOOD WATERWORKS | FL3354043 | 130 | GW |
How Grand Island compares
Full Florida rankings →Grand Island's score of 72.4/100 is above the average of 50/100 among major Florida cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Florida rankings →Learn more about your water
Guides and resources related to Grand Island's water quality findings.
Explore water quality across Lake
Frequently asked questions
Is Grand Island, FL tap water safe to drink?
Grand Island's water quality earned a grade of B- (72.4/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #213 out of 388 cities tested in Florida.
What contaminants are in Grand Island's water?
Lead was measured at 1.4 ppb (90th percentile). 60 violations are on record.
How is Grand Island's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Grand Island?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Grand Island's water come from?
Grand Island's water is sourced from Groundwater. The city has 4 water systems serving approximately 2,341 residents.
What health violations has Grand Island's water system had?
Grand Island has 4 health-based violations on record. The most recent violation was recorded in August 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 16 violations remain unresolved.
Is Grand Island's groundwater at risk of contamination?
Grand Island uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 60 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Grand Island's water compare to other cities?
Grand Island ranks #213 out of 388 cities in Florida (better than 45% of state cities) and #10320 out of 15744 cities nationally (35th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.