Otoe-missouria Tribe
EPA ID: OK1021222 · 250 people served · 1 ZIP code
Otoe-missouria Tribe carries zero EPA violations in five years — a spotless record for a utility serving 250 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 2 (2022) to 3 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Otoe-missouria Tribe Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Otoe-missouria Tribe serves a community with a median household income of $70,250 and an estimated 780 residents across its service area. Approximately 51% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Otoe-missouria Tribe's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 4% of homes in Noble County, Oklahoma rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Oklahoma
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Otoe-missouria Tribe (EPA ID: OK1021222) is a community water system in Oklahoma that serves approximately 250 people from surface water sources.
This system serves ZIP code 74651 in Red Rock.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
- 74651 — Red Rock
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Otoe-missouria Tribe (OK1021222) on EPA.gov.
Frequently Asked Questions
Is Otoe-missouria Tribe water safe to drink?
Based on EPA records, Otoe-missouria Tribe has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Otoe-missouria Tribe serve?
Otoe-missouria Tribe serves approximately 250 people across 1 ZIP code in Oklahoma.
Where does Otoe-missouria Tribe get its water?
The primary water source is surface water.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.