A
99

US Water Score: A

Oneill, NE 68763

Holt County · Population served: 3,705 · Data updated July 2026

Service-area evidence: EPA service-area records associate the listed system with this ZIP. Boundaries may still overlap or change.

Water Systems Serving This Area

🌊
ONEILL, CITY OF
Groundwater · Pop. 3,705
PWSID: NE3108904

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
1.11
15 ppb 1 ppb Warning

Water Quality Summary

Understanding Your Water in Oneill

Tap water quality in Oneill, Nebraska (68763) receives an overall grade of A (Lower record-based concern) with a score of 99 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 20 points above the Nebraska state average of 79. Compared to the national average (75), this area performs significantly better. The area is served by Oneill, City Of, a groundwater system providing water to approximately 3,705 people. Testing has found elevated levels of Lead that warrant attention. The area has a clean violation record over the past 5 years — a positive indicator of consistent water quality management.

Your Score 99/100 A
vs State 20 pts above Nebraska avg (79)
vs National 24 pts above national avg (75)

What a Grade A Means

A score of 99/100 means public water-system records for Oneill, NE show relatively few concerns in the US Water Score model. This is an internal score, not an EPA safety rating, and it does not guarantee conditions at any specific tap.

Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Based on public water-system records, Oneill, Nebraska receives an internal US Water Score grade of A (Lower record-based concern) with a score of 99/100. This indicates relatively few system-level concerns in our model, but it is not an EPA safety rating and does not guarantee tap conditions inside individual homes.

ZIP code 68763 is served by 1 water system using groundwater sources, providing water to approximately 3,705 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

Lead was reported at 1.11 ppb in public-system records for Oneill, Nebraska. This is below the currently applicable EPA action level of 15 ppb, but may be above more protective health guidance; EPA's future LCRI action level is 10 ppb. Household plumbing can materially change tap-level exposure, so consider certified filtration and individual tap testing, especially where children are present.

No PFAS ("forever chemicals") were detected in water systems serving Oneill, Nebraska during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Oneill, Nebraska have zero violations in the last 5 years. This is a positive indicator of consistent regulatory compliance and water quality management.

Based on detected contaminants (lead), residents in Oneill, Nebraska should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

Explore Nearby

Water Quality in Nearby ZIP Codes