CITY REPORT OK 15 HEALTH VIOLATIONS

Duncan, OK: 34 Violations - Home Safety Score unavailable

3 ZIP codes · 5 water systems · Updated

Data: EPA SDWIS

3
ZIP Codes
5
Water Systems
1
ZIPs with Violations
Zone 3
Radon Risk (Low)
$137K
Median Home Value
$1,333
Est. Remediation (1.0% of home value)

What You Should Know About Duncan Water

  • Your city's water systems recorded 34 violations in the past 5 years.
  • Average lead level: 0.0014 mg/L.
  • Estimated remediation: $1,333 per household.
  • CDC health risk index: 15.6 - above typical levels.

Who Supplies Your Water in Duncan

Multiple utilities divide Duncan, OK's water service - 3 leading providers among 5 on the federal register.

Overview

We track home safety data for 3 ZIP codes in Duncan, Oklahoma, covering 5 community water systems serving approximately 27,935 people. The EPA snapshots used for this build directly map water systems to 1 of 3 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 15 health-based violations appear in the available health breakdown.

Water Sources

Duncan water systems draw from: Groundwater, Surface water.

Lead & Copper

  • Average lead level (90th percentile): 0.0014 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status 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): 3 ZIP codes

Top Contaminants

Contaminant Category Violations ZIPs Affected
Haloacetic Acids (HAA5) Disinfection Byproducts 20 1
Chlorite Disinfection Byproducts 12 1
Revised Total Coliform Rule Microbiological 10 1
Consumer Confidence Report Rule Reporting 8 1
Total Coliform Microbiological 6 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
73533 34 15 Duncan Public Utilities Authority

All ZIP Codes in Duncan

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Health Outcomes in Duncan

11.6%
Asthma (US: 9.8%)
14.2%
Diabetes (US: 10.4%)
17.9%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.

Compared to National Average

Asthma 11.6% ↑
Diabetes 14.2% ↑
Mental Health 17.9% ↑

Vertical line = national average. Above national · Below national

Top Contaminants in Duncan Water

Haloacetic Acids (HAA5) 20 violations
Disinfection Byproducts · EPA limit: 0.06 mg/L
Increased cancer risk with long-term exposure
Chlorite 12 violations
Disinfection Byproducts · EPA limit: 1 mg/L
Anemia in infants and young children
Revised Total Coliform Rule 10 violations
Microbiological
Indicates possible bacterial contamination

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

Cost Context: What Remediation Means for Duncan Homeowners

Because property values in Duncan comfortably exceed estimated remediation costs, the equity impact here is proportionally small.

Median Home Value
$137,300
Est. Remediation
$1,333
Remediation as % of home value 1.0%

Remediation costs in Duncan are relatively low compared to home values. The $767–$2,633 estimated range is a small fraction of median property value. Home values are 5% below the Oklahoma average.

Lead Exposure Risk for Children in Duncan

0.0014
mg/L Avg Lead (Limit: 0.015)

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 Duncan 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.

Historical NFIP Claim Context in Duncan

67
Total FEMA Flood Claims
$10,976
Avg Reported Sum With Payment Data
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Duncan contains 67 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $10,976. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

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. The <strong>$1,333</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

Frequently Asked Questions

How many water violations does Duncan have?
Duncan water systems have a total of 34 EPA violations, including 15 health-based violations. Violations are tracked across 3 ZIP codes.
Does Duncan water have lead?
The average 90th-percentile lead level in Duncan is 0.0014 mg/L. This is below the EPA action level of 0.015 mg/L. Lead levels can vary by home - testing is recommended especially in older properties.
How many water systems serve Duncan?
Duncan is served by 5 public water systems across 3 ZIP codes, serving approximately 27,935 people.
How much does it cost to fix water issues in Duncan?
Estimated remediation costs in Duncan average $1,333 per household, ranging from $767 to $2,633. Costs include filtration, pipe replacement, radon mitigation, and flood protection.
HomeCitiesOklahoma → Duncan, OK

How to cite this page

APA ZipCheckup. (2026). Duncan, OK: 34 Violations - Home Safety Score unavailable. https://zipcheckup.com/cities/ok/duncan/
BibTeX
@misc{zipcheckup-cities-ok-duncan,
  author = {{ZipCheckup}},
  title  = {{Duncan, OK: 34 Violations - Home Safety Score unavailable}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/ok/duncan/}
}

Page version: August 2026.

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