Seminole, OK Water Safety: 93/100 (2026)
2 ZIP codes · 5 water systems · Updated 2026-06-03
Water utilities in Seminole have maintained a consistent compliance record over recent monitoring periods — the city's above-average grade in OK reflects low violation rates and no systemic health concerns flagged in current data.
How Seminole Compares
Data: EPA SDWIS Last verified: 2026-06-03
Seminole Water: The Quick Version
- Average lead level: 0.0017 mg/L.
- Estimated remediation: $1,500 per household.
- CDC health risk index: 17.12 — above typical levels.
Water Systems Serving Seminole
Water supply in Seminole, OK follows a divided structure: 3 utilities account for the largest share of residential service out of 5 total systems, each managing its own distribution network and EPA reporting. Because these systems operate independently, rate decisions and compliance outcomes are determined separately.
Overview
We track water quality and home safety data for 2 ZIP codes in Seminole, Oklahoma, covering 5 community water systems serving approximately 12,451 people.
No EPA violations recorded across any ZIP codes in Seminole — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Seminole: A (93/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Seminole water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0017 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
Areas with No Violations
All ZIP Codes in Seminole
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Seminole
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Seminole: Remediation Cost in Perspective
While Seminole homeowners face a manageable path to remediation, the equity share sits in the moderate tier — a signal that proactive budgeting matters more here than in lower-ratio markets.
Remediation costs are moderate relative to home values in Seminole. The estimated $1,000–$2,150 range is manageable for most homeowners but still worth budgeting for. Home values are 29% below the Oklahoma average.
Protecting Children from Lead in Seminole
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Seminole appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Seminole
A moderate NFIP record for Seminole — 39 insurance claims paired with 50% of ZIP codes in FEMA flood zones — points to a flood history where water-quality pathways have likely been periodically relevant.
Seminole has a moderate flood history with 39 FEMA claims averaging $14,477 per payout. 50% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,500</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Seminole, OK