Norman, OK: 24 Health Violations — 81/100 (2026)
6 ZIP codes · 11 water systems · Updated 2026-06-03
In current OK EPA data, Norman's tap water sits in the high-safety tier.
How Norman Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Norman, OK
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
How ZIP codes in Norman score across all safety grades.
What You Should Know About Norman Water
- Your city's water systems recorded 192 violations in the past 5 years.
- Average lead level: 0.0006 mg/L.
- Homes built before 1986: 48% — older plumbing may contain lead solder.
- Estimated remediation: $2,117 per household.
- CDC health risk index: 12.44 — above typical levels.
Who Supplies Your Water in Norman
Norman, OK is covered by 3 major water utilities out of 11 federally tracked systems, each managing its own pipes, treatment processes, and EPA filings. What a household gets from the tap depends on which provider's system serves that address.
Overview
We track water quality and home safety data for 6 ZIP codes in Norman, Oklahoma (population ~133,176), covering 11 community water systems serving approximately 804,852 people region-wide.
6 of 6 ZIP codes (100%) have recorded EPA violations. 24 health-based violations documented.
Home Safety Score
Average Home Safety Score for Norman: B (81/100)
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
Norman water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0006 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): 6 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 140 | 6 |
| Stage 2 DBP Rule | Treatment Technique | 28 | 6 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 14 | 6 |
| Revised Total Coliform Rule | Microbiological | 14 | 6 |
| Arsenic | Inorganic | 7 | 6 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 73019 | A | 32 | 4 | Norman Utilities Authority |
| 73026 | B | 32 | 4 | Norman Utilities Authority |
| 73069 | B | 32 | 4 | Norman Utilities Authority |
| 73070 | A | 32 | 4 | Norman Utilities Authority |
| 73071 | B | 32 | 4 | Norman Utilities Authority |
| 73072 | B | 32 | 4 | Norman Utilities Authority |
All ZIP Codes in Norman
- 73019 [A] — 32 violations ⚠
- 73026 [B] — 32 violations ⚠
- 73069 [B] — 32 violations ⚠
- 73070 [A] — 32 violations ⚠
- 73071 [B] — 32 violations ⚠
- 73072 [B] — 32 violations ⚠
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.
Health Outcomes in Norman
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
Top Contaminants in Norman Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Norman
With 48% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Plumbing risk in residential housing tracks directly to construction era: pre-1986 homes may have lead-soldered copper joints; pre-1970 homes may have lead pipes outright. Norman's median build year of 1993 places the city in a moderate risk zone where neither era dominates the housing inventory. Understanding which side of the 1986 threshold a specific property falls on — and whether it predates 1970 — is the most actionable starting point for a homeowner trying to assess their own tap water exposure.
Most homes in Norman were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Norman Homeowners
Equity impact data for Norman lands in the favorable tier — remediation claims a small slice of what properties here are worth.
Remediation costs in Norman are relatively low compared to home values. The $1,283–$3,783 estimated range is a small fraction of median property value. Home values are 84% above the Oklahoma average.
Lead Exposure Risk for Children in Norman
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.
Routinely in Norman, where 48% of housing predates the solder ban and aggregate utility readings hover near the federal threshold, a faucet-level draw functions as a standard household step for families with small kids.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Norman
Over the multi-decade window covered by the National Flood Insurance Program, Norman has accumulated 197 claims — a total that suggests more than isolated flood exposure. With 83% of ZIP codes in designated flood zones, the water-quality implications of flooding move from hypothetical to periodically relevant: treatment intake can be compromised, wells can be infiltrated, and distribution backflow can occur.
Norman has a moderate flood history with 197 FEMA claims averaging $14,799 per payout. 83% 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>$2,117</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 Norman, OK