Arnolds Park, IA (51331): PFAS Detected in Mapped Water Systems
EPA data combined for 5 water systems mapped to this ZIP (largest mapped system: Arnolds Park Water Department)
Health-based violation records by water system:
EPA records for the water systems mapped to 51331 in Arnolds Park, IA contain 1 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 1 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 1 health-based violation (since 2021).
- Lead The reported 90th-percentile lead result of 0.002 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
- Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
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This report sorts findings for 51331 in Arnolds Park into two severity tiers using its own criteria: lead above the EPA action level, unresolved violations on record or a PFAS result above the level of an EPA PFAS maximum contaminant level (enforced from 2029) for the critical tier, and a PFAS detection or elevated carbon monoxide risk for the high-priority tier. In the available data, the high-priority tier holds 1 and the critical tier hold none; each card below describes one finding.
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (6) CRITICAL
Your Water System
ZIP code 51331 in Arnolds Park, Iowa is mapped to the water system Arnolds Park Water Department (EPA ID: IA3003067). This system provides water to approximately 1,113 people from surface water sources.
There are 5 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Arnolds Park Water Department | IA3003067 | 1,113 | Surface water |
| Okoboji Water Supply | IA3060091 | 776 | Surface water |
| Wahpeton Water Supply | IA3087057 | 408 | Surface water |
| Milford Municipal Utilities | IA3050079 | 3,431 | Surface water |
| West Okoboji | IA3090081 | 308 | Surface water |
Other Water Quality Reports in Iowa
- 50001 (Ackworth) - 2 violations recorded for mapped water systems
- 50002 (Adair)
- 50003 (Adel) - 9 violations recorded for mapped water systems
- 50005 (Albion)
- 50006 (Alden)
- 50007 (Alleman)
- 50008 (Allerton)
- 50009 (Altoona) - 5 violations recorded for mapped water systems
- 50010 (Ames) - 4 violations recorded for mapped water systems
- 50011 (Ames)
- 50012 (Ames) - 2 violations recorded for mapped water systems
- 50013 (Ames) - 2 violations recorded for mapped water systems
- 50014 (Ames) - 5 violations recorded for mapped water systems
- 50020 (Anita)
- 50021 (Ankeny)
- 50022 (Atlantic)
- 50023 (Ankeny)
- 50025 (Audubon)
- 50026 (Bagley)
- 50027 (Barnes City)
Nearby Water Quality Reports
- 51355 (Okoboji) - 2 mi - 1 violation recorded for mapped water systems
- 51351 (Milford) - 3 mi - 1 violation recorded for mapped water systems
- 51360 (Spirit Lake) - 4 mi - 2 violations recorded for mapped water systems
- 51364 (Terril) - 8 mi - 1 violation recorded for mapped water systems
- 51363 (Superior) - 10 mi
- 51347 (Lake Park) - 11 mi
- 51301 (Spencer) - 15 mi
- 51334 (Estherville) - 16 mi
- 51333 (Dickens) - 16 mi
- 51365 (Wallingford) - 17 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Arnolds Park Water Department (IA3003067) on EPA.gov.
5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 51331.
Detected compounds: PFBA.
Highest measured level: 0.0092 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (10) MODERATE
Home & Infrastructure (6) OK
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Frequently Asked Questions
Is the tap water in 51331 safe to drink?
EPA SDWIS records 1 violation since 2021 across the water systems mapped to ZIP 51331 (primary system: Arnolds Park Water Department), including 1 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 51331's water come from?
The recorded water source for Arnolds Park Water Department, a system mapped to ZIP code 51331, is Surface water. This system serves approximately 1,113 people.
How can I get my water tested in Arnolds Park?
If Arnolds Park Water Department supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 51331 tap water?
The Lead and Copper Rule record selected for 51331 reports a 90th-percentile lead result of 0.002 mg/L for a water system mapped to this ZIP (record date 2023-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
What is the radon risk for 51331?
51331 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Dickinson County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 51331's water?
Yes, PFAS have been detected in samples from water systems mapped to 51331. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Arnolds Park, IA (51331): PFAS Detected in Mapped Water Systems. https://zipcheckup.com/report/51331/
@misc{zipcheckup-report-51331,
author = {{ZipCheckup}},
title = {{Arnolds Park, IA (51331): PFAS Detected in Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/51331/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 51331
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 51355 | Okoboji, IA | 1.8 mi | N/A | 1 |
| 51351 | Milford, IA | 3.5 mi | N/A | 1 |
| 51360 | Spirit Lake, IA | 4.4 mi | N/A | 2 |
| 51364 | Terril, IA | 8.2 mi | N/A | 1 |
| 51363 | Superior, IA | 10.2 mi | N/A | 0 |
| 51347 | Lake Park, IA | 11.2 mi | N/A | 0 |
| 51301 | Spencer, IA | 15.1 mi | N/A | 0 |
| 51334 | Estherville, IA | 15.8 mi | N/A | 0 |
| 51333 | Dickens, IA | 16.1 mi | N/A | 0 |
| 51365 | Wallingford, IA | 17.0 mi | N/A | 0 |
Nearby ZIP Code Reports
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