Is Arnolds Park, IA Tap Water Safe to Drink?
Graded A-, with 1 unresolved violation on record. See what was cited — and what it means for your tap. What to do next ↓
85.7/100
waterverge.com Arnolds Park, IA — Water Quality Report
Arnolds Park's drinking water received a grade of A- (85.7 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,110 residents using purchased surface water.
Lead levels were measured at 2.0 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 1 violation on record, including 0 health-based violations. 1 remains unresolved.
What to know about Arnolds Park's water
Arnolds Park ranks #333 out of 436 cities in Iowa for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Arnolds Park may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Arnolds Park, IA water safe to drink?
Arnolds Park's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (85.7/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 1,110 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Arnolds Park
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Arnolds Park's water quality assessment. Grade: A- (85.7/100).
Federal disaster declaration (FEMA DR-4421). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4184). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Arnolds Park's water supply.
Well within EPA limits.
Violation history
Arnolds Park's water system has 1 total violation on record, including 0 health-based violations. 1 remain unresolved.
Flood & environmental risk
Dickinson County has experienced 8 federally declared disasters since 1965. 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 Spirit Lake Near Orleans, West Okoboji Lake At Lakeside Lab Near Milford.
Where does Arnolds Park's water come from?
Arnolds Park's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 1,110 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Spirit Lake Near Orleans (lake), West Okoboji Lake At Lakeside Lab Near Milford (lake).
What Arnolds Park residents can do
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.
Arnolds Park'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 Arnolds Park
Industrial polluters nearby
Reported releases to surface water by facilities near Arnolds Park, ranked by pounds discharged annually.
Total reported releases to surface water: 5 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
POLARIS INDUSTRIES INC SPIRIT LAKE, IA51360 | Copper | 5 | 4.3 mi |
ROSENBOOM MACHINE & TOOL INC SPIRIT LAKE, IA51360 | — | — | 4.1 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Dickinson County has experienced 8 federally declared disasters since 1965. 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. | 2.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Arnolds Park compares by contaminant
Explore where Arnolds Park ranks among all Iowa cities for specific contaminants.
Water source & infrastructure
Where Arnolds Park's water comes from
Arnolds Park's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 1,110 people through 1 water system.
Water bodies near Arnolds Park
Arnolds Park is located near 2 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Arnolds Park
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ARNOLDS PARK WATER DEPARTMENT | IA3003067 | 1,110 | SWP |
How Arnolds Park compares
Full Iowa rankings →Arnolds Park's score of 85.7/100 is above the average of 72/100 among major Iowa cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Iowa rankings →About Arnolds Park, IA
Wikipedia →Arnolds Park is a city in Dickinson County, Iowa, United States. The population was 1,110 in the 2020 census, a decline from the 1,162 population in the 2000 census.
Learn more about your water
Guides and resources related to Arnolds Park's water quality findings.
Explore water quality across Dickinson
Frequently asked questions
Is Arnolds Park, IA tap water safe to drink?
Arnolds Park's water quality earned a grade of A- (85.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #333 out of 436 cities tested in Iowa.
What contaminants are in Arnolds Park's water?
Lead was measured at 2.0 ppb (90th percentile). 1 violation is on record.
How is Arnolds Park'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 Arnolds Park?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Arnolds Park's water come from?
Arnolds Park's water is sourced from Purchased surface water. The city has 1 water system serving approximately 1,110 residents.
How does Arnolds Park's water compare to other cities?
Arnolds Park ranks #333 out of 436 cities in Iowa (better than 24% of state cities) and #5182 out of 15744 cities nationally (67th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Arnolds Park's small water system affect quality?
Arnolds Park's system serves approximately 1,110 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 1 violation on record.