Is Long Grove, IA Tap Water Safe to Drink?
Graded A, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
90.8/100
waterverge.com Long Grove, IA — Water Quality Report
Long Grove's drinking water received a grade of A (90.8 out of 100), indicating excellent water quality. The city's 2 water systems serve approximately 988 residents using groundwater.
Lead levels were measured at 1.5 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 61 violations on record, including 6 health-based violations. 3 remain unresolved.
What to know about Long Grove's water
Long Grove ranks #166 out of 436 cities in Iowa for water quality, placing it mid-range in the state.
Long Grove 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, Long Grove may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Long Grove, IA water safe to drink?
Long Grove's drinking water has significant quality concerns based on EPA testing data. With a grade of A (90.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 988 residents using groundwater (wells).
Recent water quality updates for Long Grove
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Long Grove's water quality assessment. Grade: A (90.8/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4732). Flood event — may have impacted local water infrastructure.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4421). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Long Grove's water supply.
Well within EPA limits.
Violation history
Long Grove's water system has 61 total violations on record, including 6 health-based violations. 3 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Scott County has experienced 10 federally declared disasters since 1969. 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 Wapsipinicon River Near De Witt, Crow Creek At Bettendorf.
Where does Long Grove's water come from?
Long Grove's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 988 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Wapsipinicon River Near De Witt (river), Crow Creek At Bettendorf (river).
What Long Grove residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Long Grove'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.
Long Grove'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
Top industrial polluters within 10 miles of Long Grove
Industrial polluters nearby
Reported releases to surface water by facilities near Long Grove, ranked by pounds discharged annually.
Total reported releases to surface water: 462 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
PB LEINER USA DAVENPORT, IA52806 | Ammonia | 261 | 7.1 mi |
JOHN DEERE DAVENPORT WORKS DAVENPORT, IA52807 | Manganese | 201 | 6.4 mi |
GUARDIAN INDUSTRIES - DEWITT DE WITT, IA52742 | Lead compounds | 0 | 8.7 mi |
MAGNAFLUX DE WITT, IA52742 | — | — | 8.6 mi |
CHEMTREAT INC ELDRIDGE IA ELDRIDGE, IA52748 | — | — | 4.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Scott County has experienced 10 federally declared disasters since 1969. 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. | 1.5 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Long Grove compares by contaminant
Explore where Long Grove ranks among all Iowa cities for specific contaminants.
Water source & infrastructure
Where Long Grove's water comes from
Long Grove'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 local government ownership and serves approximately 988 people through 2 water systems.
Water bodies near Long Grove
Long Grove is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Long Grove
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LONG GROVE MUNI WATER SUPPLY | IA8251096 | 838 | GW |
| COUNTRY ESTATES MHP | IA8200601 | 150 | GW |
How Long Grove compares
Full Iowa rankings →Long Grove's score of 90.8/100 is above the average of 72/100 among major Iowa cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Iowa rankings →About Long Grove, IA
Learn more about your water
Guides and resources related to Long Grove's water quality findings.
Explore water quality across Scott
Frequently asked questions
Is Long Grove, IA tap water safe to drink?
Long Grove's water quality earned a grade of A (90.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #166 out of 436 cities tested in Iowa.
What contaminants are in Long Grove's water?
Lead was measured at 1.5 ppb (90th percentile). 61 violations are on record.
How is Long Grove'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 Long Grove?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Long Grove's water come from?
Long Grove's water is sourced from Groundwater. The city has 2 water systems serving approximately 988 residents.
What health violations has Long Grove's water system had?
Long Grove has 6 health-based violations on record. The most recent violation was recorded in April 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
Is Long Grove's groundwater at risk of contamination?
Long Grove 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 61 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 Long Grove's water compare to other cities?
Long Grove ranks #166 out of 436 cities in Iowa (better than 62% of state cities) and #2051 out of 15744 cities nationally (87th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.