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WaterSafeCheck

ZIP Code 66522 Water Quality Report

Oneida, KS · Nemaha County County

Safety Score
D

Water Safety Grade

Poor — Multiple violations recorded

Health Violations

1

Total Violations

12

Lead Risk

Very High

Contaminants

1

About Tap Water in ZIP Code 66522

Tap water in ZIP code 66522 (Oneida, KS) has received a D grade (score: 53/100) — below average for the nation. City of Oneida, has recorded notable violations with EPA Safe Drinking Water Act regulations. Residents may want to consider additional filtration and review their annual Consumer Confidence Report.

Water System

City of Oneida,

EPA ID: KS2013103

Water Source

Ground Water

Population Served

58 residents

County

Nemaha County County, Kansas

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Lead Levels in ZIP 66522

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 8.5 ppb — Below Action Level

The 90th percentile lead level in 66522 is 8.5 ppb, below the EPA action level of 15 ppb but above what many health experts consider ideal. The CDC and EPA both affirm there is no safe level of lead exposure for children. Families with young children or pregnant women should consider a certified NSF/ANSI 53 water filter, and request lead testing of their home's tap water.

Lead exposure risk in 66522 is rated Very High. EPA models estimate a 81% probability of lead exposure risk in this ZIP code based on housing age, infrastructure age, and water system data. This is among the highest risk categories nationally, often associated with heavily aging infrastructure and pre-1986 construction. Do not give unfiltered tap water to children under 6 or pregnant women. Consider getting your home's plumbing tested for lead solder and fixtures.

Lead Level (90th percentile)
8.50 ppb (0.0085 mg/L)
Lead Exposure Risk Rating
Very High
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

81%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Violation History

Past 5 years — EPA SDWIS data

City of Oneida, has recorded 1 health-based violation in the past 5 years. A single health violation means the water exceeded an EPA maximum contaminant level (MCL) at some point. Most water systems resolve these quickly, but residents should review the Consumer Confidence Report for details. 1 violation is currently unresolved — meaning the issue has not yet been formally corrected in EPA records. This is a serious concern that residents should follow up on with their water utility.

Total Violations (5 yr)
12
Health-Based Violations
1
Unresolved Violations
1
Boil Water Advisories
0
Compliance Risk
Critical

Regulatory compliance risk is rated Critical — the highest risk category. City of Oneida, has an extensive history of unresolved violations and enforcement actions. Independent water testing is highly recommended.

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Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 1 contaminant associated with health-based violations in ZIP code 66522: Contaminant 0700. These contaminants exceeded the Maximum Contaminant Levels (MCLs) established by the EPA under the Safe Drinking Water Act at some point in the 5-year monitoring period. The presence of these violations does not necessarily mean water is currently unsafe — water systems are often required to increase monitoring and treatment when violations occur. Review the annual Consumer Confidence Report for the most current status.

Contaminant 0700

⚖ Enforcement Actions

10 enforcement actions have been issued against City of Oneida, — a high number that reflects sustained compliance struggles. Enforcement actions escalate from administrative orders to financial penalties when utilities repeatedly fail to meet safe drinking water standards.
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Water Source & Environmental Factors

Ground Water

This system draws water from underground aquifers. Groundwater is naturally filtered through soil and rock, but can still contain naturally occurring minerals like arsenic, radium, or nitrates.

Water Source Type
Ground Water
EPA Radon Zone

Highest potential

Zone 1
Energy Burden

% of household income spent on energy — indicator of older infrastructure

2.48%

EPA Radon Zone 1 — highest potential for radon in indoor air. Homeowners should test their home for radon and consider mitigation if levels exceed 4 pCi/L.

🛡 What Should You Do? — ZIP 66522 Recommendations

  • 🚨 Install a certified NSF/ANSI 53 or 58 (reverse osmosis) filter immediately for drinking and cooking
  • 🚨 Do not give unfiltered water to children, pregnant women, or immunocompromised individuals
  • 🚨 Contact City of Oneida, to request the current violation status and corrective action plan
  • 🚨 Report concerns to your state environmental agency or call the EPA hotline: 1-800-426-4791
  • 🚨 Consider having your home's tap water independently tested by a certified lab

Frequently Asked Questions — ZIP 66522 Water Quality

Is tap water safe to drink in ZIP code 66522?+
Tap water in 66522 has a below-average water quality grade of D. While it is treated, there have been notable compliance issues. We strongly recommend using a certified NSF/ANSI 53 water filter for drinking and cooking, especially for vulnerable populations.
What is the lead level in 66522 tap water?+
The 90th percentile lead level in 66522 is 8.5 ppb (parts per billion). The EPA action level is 15 ppb. This is below the action level, but some health experts recommend a lead filter for families with young children.
Who provides tap water to 66522?+
Tap water in ZIP code 66522 is provided by City of Oneida, (EPA ID: KS2013103). This system serves approximately 58 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 66522?+
ZIP code 66522 is served by ground water. Groundwater systems draw from underground aquifers. While naturally filtered, groundwater can still contain naturally occurring contaminants such as arsenic, radium, or nitrates at elevated levels in some regions.
Does 66522 have any active water quality violations?+
Yes — there are currently 1 unresolved violation on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact City of Oneida, for the latest update.
How do I get a copy of my water quality report for 66522?+
Your water utility — City of Oneida, — is required by law to send you an annual Consumer Confidence Report (CCR) by July 1 each year. You can also request it directly from the utility or find it online by searching "City of Oneida, Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 66522?+
The right filter depends on what contaminants are present. For lead, look for a filter certified to NSF/ANSI Standard 53. For chlorine byproducts (like THMs), NSF/ANSI 42 filters work well. For a broad range of contaminants including PFAS, look for NSF/ANSI 58 (reverse osmosis) systems. For ZIP code 66522, with detected contaminants including Contaminant 0700, a multi-stage filter or reverse osmosis system is recommended.
Is 66522 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Given the detected lead level of 8.5 ppb in 66522, we recommend using a certified NSF/ANSI 53 water filter or certified bottled water for preparing infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 66522 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by City of Oneida,. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →