Lead · Oklahoma

Lead in Oklahoma Drinking Water — 460 ZIPs Tested

EPA data analysis for lead in Oklahoma drinking water systems

ZipCheckup tracks Lead in Oklahoma drinking water: 460 ZIP codes with detected levels on record. 91 ZIP codes exceed the EPA limit (15 ppb (action level)). Lead carries a high health-risk designation.

460
ZIPs with Detections
91
ZIPs with Violations
16.6%
Violation Rate
15 ppb (action level)
EPA Limit
High
Health Risk
Reverse Osmosis or NSF 53 Carbon Block
Best Filter Method

Lead Contamination in Oklahoma

ZipCheckup analyzed drinking water data across 549 ZIP codes in Oklahoma for lead contamination. 460 ZIP codes have reported lead detections, and 91 have EPA violations on record.

The violation rate for lead in Oklahoma is 16.6% of all ZIP codes — higher than the national average.

EPA Standard for Lead

The EPA maximum contaminant level (MCL) for lead is 15 ppb (action level), governed by the Lead and Copper Rule (LCRR/LCRI). Water systems that exceed this limit must take corrective action and notify consumers.

Worst ZIP Codes for Lead in Oklahoma

These ZIP codes reported the highest lead levels in Oklahoma based on CCR reports and EPA data:

Lowest Lead Levels in Oklahoma

These ZIP codes had the lowest reported lead detections in Oklahoma:

Health Effects of Lead

Lead is a potent neurotoxin with no safe level of exposure. In children, lead causes developmental delays, reduced IQ, and behavioral problems. In adults, it causes high blood pressure, kidney damage, and cardiovascular effects. Pregnant women face increased risk of premature birth.

How to Remove Lead From Drinking Water

The most effective treatment for lead removal is Reverse Osmosis or NSF 53 Carbon Block. Look for filters certified under NSF 53 / NSF 58 standards.

Check Your ZIP Code

Use the ZipCheckup water quality search to see lead data for your specific water system in Oklahoma.

Worst ZIP Codes for Lead in Oklahoma

Ranked by highest lead detection level.

Rank ZIP Code City Level Detected EPA Limit Status
1 73020 Choctaw 32 ppb 15 ppb Exceeds
2 73084 Spencer 32 ppb 15 ppb Exceeds
3 73130 Oklahoma City 32 ppb 15 ppb Exceeds
4 73141 Oklahoma City 32 ppb 15 ppb Exceeds
5 73010 Blanchard 23 ppb 15 ppb Exceeds
6 73065 Newcastle 23 ppb 15 ppb Exceeds
7 73072 Norman 23 ppb 15 ppb Exceeds
8 73080 Purcell 23 ppb 15 ppb Exceeds
9 73093 Washington 23 ppb 15 ppb Exceeds
10 74536 Clayton 14 ppb 15 ppb Within Limit
11 74558 Nashoba 14 ppb 15 ppb Within Limit
12 74574 Tuskahoma 14 ppb 15 ppb Within Limit
13 73734 Dover 12 ppb 15 ppb Within Limit
14 73737 Fairview 12 ppb 15 ppb Within Limit
15 73744 Hitchcock 12 ppb 15 ppb Within Limit
16 73750 Kingfisher 12 ppb 15 ppb Within Limit
17 73756 Loyal 12 ppb 15 ppb Within Limit
18 73763 Okeene 12 ppb 15 ppb Within Limit
19 73772 Watonga 12 ppb 15 ppb Within Limit
20 73045 Harrah 11 ppb 15 ppb Within Limit

Lowest Lead Levels in Oklahoma

ZIP Code City Level Detected
74940 Howe 1 ppb
74937 Heavener 1 ppb
74932 Cameron 1 ppb
74867 Sasakwa 1 ppb
74852 Macomb 1 ppb
74850 Lamar 1 ppb
74748 Kenefic 1 ppb
74745 Idabel 1 ppb
74741 Hendrix 1 ppb
74740 Haworth 1 ppb

Cities with Lead Data in Oklahoma

94 cities in Oklahoma have lead testing data available.

+ 74 more cities

Oklahoma Water Quality Overview: See statewide water quality rankings on the Oklahoma water quality page.
Learn more about Lead: Read the full guide on Lead in drinking water.
Home → Contaminants → Lead → Oklahoma

How to cite this page

APA ZipCheckup. (2026). Lead in Oklahoma Drinking Water — 460 ZIPs Tested. https://zipcheckup.com/contaminants/lead/oklahoma/
BibTeX 
@misc{zipcheckup-contaminants-lead-oklahoma,
  author = {{ZipCheckup}},
  title  = {{Lead in Oklahoma Drinking Water — 460 ZIPs Tested}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/lead/oklahoma/}
}

Page version: August 2026.

Check your water filter options Free tool - no phone call required.