CITY REPORT OK HEALTH VIOLATIONS: 8

Dewey, OK: 8 Health Violations - Home Safety 83/100

1 ZIP code · 5 water systems · Updated

ZipCheckup grade for Dewey: B.

The model grade is high, but the records on this page include findings worth reviewing.

Your top priority: match a filter's certification to the violations (8 health-based violations). NSF certified filters →

Dewey, OK scores in the upper band of the ZipCheckup grade.

How Dewey Compares

Dewey83/100
Oklahoma avg86/100
National avg73/100

Data: EPA SDWIS

1
ZIP Codes
5
Water Systems
1
ZIPs Linked to Systems with Violations
B · 83
Avg Safety Score
Zone 3
County Radon Potential (Low)
$139K
Median Home Value
$1,100
Est. Remediation (0.8% of home value)

Dewey Water: The Quick Version

  • Your city's water systems recorded 55 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.0038 mg/L.
  • Homes built before 1986: 73% - older plumbing may contain lead solder.
  • Estimated remediation: $1,100 per household.
  • Health risk index (ZipCheckup composite of CDC data): 14.98.

Water Systems Serving Dewey

When a city is linked to 5 water systems, as Dewey, OK is in federal records, water in one neighborhood may come from a different system than in another. The 3 systems with the largest reported populations are shown below, and their compliance records are kept separately, so a violation logged for one does not describe the others.

Overview

We track home safety data for 1 ZIP code in Dewey, Oklahoma (population ~5,270), covering 5 community water systems serving approximately 8,145 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 8 health-based violations appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Dewey: B (83/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

Dewey water systems draw from: Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0038 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

1 of 1 ZIP records with known zones is in EPA Radon Zone 3.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Top Contaminants

Contaminant Category Violations ZIPs Affected
Lead and Copper Rule Treatment Technique 46 1
Lead and Copper Rule Revisions Treatment Technique 20 1
Total Trihalomethanes (TTHM) Disinfection Byproducts 18 1
Haloacetic Acids (HAA5) Disinfection Byproducts 10 1
Revised Total Coliform Rule Microbiological 6 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
74029 B 55 8 Dewey Public Works Authority

All ZIP Codes in Dewey

  • 74029 [B] - 55 violations ⚠

Data Sources

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

CDC Health Data for Dewey

11.6%
Asthma (US: 9.8%)
13.2%
Diabetes (US: 10.4%)
17.2%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 11.6% ↑
Diabetes 13.2% ↑
Mental Health 17.2% ↑

Vertical line = national average. ■ Above national · ■ Below national

Key Contaminants Detected in Dewey

Lead and Copper Rule 46 violations
Treatment Technique
Developmental delays in children, kidney damage
Lead and Copper Rule Revisions 20 violations
Treatment Technique
Total Trihalomethanes (TTHM) 18 violations
Disinfection Byproducts · EPA regulatory level for the contaminant named above: 0.08 mg/L
Increased cancer risk with long-term exposure above the MCL

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

How Old Is Dewey's Housing Stock?

1950
Median Build Year
73%
Built Before 1986
56%
Built Before 1970
Galvanized Steel or Copper
Likely Pipe Material

With 73% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

If you live in one of the pre-1986 homes in Dewey, a certified lab test for lead is the direct way to learn what your tap delivers; the median build year of 1950 is only context.

1950
Median Year Built
73%
Pre-1986 (lead solder era; lead paint banned 1978)
56%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (56%) 1970–1986 (17%) Post-1986 (27%)

Over half of homes in Dewey were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.

Source: U.S. Census Bureau ACS B25034.

Dewey: Remediation Cost in Perspective

Compared with typical property prices, the remediation estimate for Dewey is small in percentage terms - at or under one percent.

Median Home Value
$139,200
Est. Remediation
$1,100
Remediation as % of home value 0.8%

Estimated remediation costs in Dewey can be compared with local home values. The $600–$2,300 estimated range can be set against the median property value; actual costs vary by home. Home values are 4% below the Oklahoma average.

Protecting Children from Lead in Dewey

73%
Homes Built Before 1986
0.0038
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical Flood-Claim Evidence for Dewey

33
Total FEMA Flood Claims
$27,439
Avg Reported Sum With Payment Data
100%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Dewey contains 33 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $27,439. Among ZIP codes with claim records, 100% 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 $1,100 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.

Deep Dive Reports

Detailed analysis for Dewey, OK

Frequently Asked Questions

What does the Home Safety Score mean for Dewey, OK?
Dewey has an average Home Safety Score of 83/100 (Grade B) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 55 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving Dewey?
EPA records list 55 EPA violations, including 8 health-based violations for Dewey water systems. These water-system violations are shown for 1 mapped ZIP code.
Does Dewey water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Dewey is 0.0038 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Dewey compare to Oklahoma average?
Dewey has an average Home Safety Score of 83/100, which is below the Oklahoma state average of 86/100 for the same model series.
How many water systems serve Dewey?
Our records map 5 water systems to 1 ZIP code in Dewey. The related population figure in our data is approximately 5,270 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Dewey?
Estimated remediation cost per household in Dewey: $1,100; modeled range $600 to $2,300. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). Dewey, OK: 8 Health Violations - Home Safety 83/100. https://zipcheckup.com/cities/ok/dewey/
BibTeX 
@misc{zipcheckup-cities-ok-dewey,
  author = {{ZipCheckup}},
  title  = {{Dewey, OK: 8 Health Violations - Home Safety 83/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/ok/dewey/}
}

Page version: October 2026.

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