2026 Rankings

Worst ZIP Codes for Lead in Water in Oklahoma — 2026

Last updated: June 4, 2026

617 ZIP codes ranked by Lead (mg/L) #1: ZIP 74045 (Maramec, OK) — 900.0 ppb
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 617 ZIP codes with data in Oklahoma, these are the highest-ranked areas for lead (mg/l). See also: National Worst ZIP Codes for Lead in Water | All Oklahoma Rankings

Statistic Value
ZIP codes ranked 617
Highest value 900.0 ppb
Median value 2.2 ppb
State Oklahoma

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (mg/L) Safety Score
1 74045 Maramec OK 900.0 ppb 66/100
2 73569 Terral OK 826.0 ppb 93/100
3 74755 Rufe OK 815.0 ppb 66/100
4 74723 Bennington OK 559.0 ppb 97/100
5 74726 Bokchito OK 559.0 ppb 88/100
6 74731 Cartwright OK 559.0 ppb 84/100
7 74873 Tecumseh OK 20.5 ppb 40/100
8 74332 Big Cabin OK 19.5 ppb 41/100
9 73852 Mooreland OK 19.4 ppb 65/100
10 73843 Gage OK 16.7 ppb 82/100
11 73002 Alex OK 16.2 ppb 65/100
12 73659 Putnam OK 16.2 ppb 66/100
13 73059 Minco OK 16.1 ppb 61/100
14 73024 Corn OK 15.6 ppb 65/100
15 73857 Sharon OK 15.3 ppb 61/100
16 73931 Balko OK 15.0 ppb 53/100
17 73932 Beaver OK 15.0 ppb 76/100
18 74536 Clayton OK 13.7 ppb 37/100
19 74558 Nashoba OK 13.7 ppb 66/100
20 74567 Snow OK 13.7 ppb 66/100
21 74849 Konawa OK 13.7 ppb 91/100
22 74630 Billings OK 12.7 ppb 73/100
23 73020 Choctaw OK 11.4 ppb 63/100
24 73735 Drummond OK 11.2 ppb 79/100
25 73938 Forgan OK 11.1 ppb 58/100
26 74338 Colcord OK 10.7 ppb 68/100
27 74964 Watts OK 10.0 ppb 66/100
28 73559 Mountain Park OK 10.0 ppb 70/100
29 74948 Muldrow OK 9.6 ppb 60/100
30 74959 Spiro OK 9.4 ppb 59/100
31 74344 Grove OK 9.3 ppb 61/100
32 74345 Grove OK 9.3 ppb 62/100
33 73085 Yukon OK 9.0 ppb 75/100
34 73099 Yukon OK 9.0 ppb 64/100
35 74878 Wanette OK 9.0 ppb 53/100
36 73624 Burns Flat OK 8.4 ppb 87/100
37 73051 Lexington OK 8.3 ppb 70/100
38 73528 Chattanooga OK 7.6 ppb 66/100
39 73546 Grandfield OK 7.6 ppb 55/100
40 73553 Loveland OK 7.6 ppb 66/100
41 73443 Lone Grove OK 7.5 ppb 88/100
42 73728 Cherokee OK 7.4 ppb 82/100
43 73762 Okarche OK 7.4 ppb 64/100
44 74843 Fitzhugh OK 7.3 ppb 66/100
45 73749 Jet OK 7.1 ppb 91/100
46 74842 Fittstown OK 7.0 ppb 86/100
47 74060 Prue OK 6.9 ppb 94/100
48 74063 Sand Springs OK 6.9 ppb 74/100
49 74131 Tulsa OK 6.9 ppb 94/100
50 73773 Waukomis OK 6.8 ppb 88/100
51 73557 Medicine Park OK 6.8 ppb 87/100
52 73757 Lucien OK 6.7 ppb 66/100
53 74010 Bristow OK 6.7 ppb 94/100
54 73043 Greenfield OK 6.6 ppb 89/100
55 73860 Waynoka OK 6.6 ppb 90/100
56 74050 Oakhurst OK 6.6 ppb 89/100
57 73639 Custer City OK 6.5 ppb 89/100
58 73048 Hydro OK 6.4 ppb 89/100
59 74056 Pawhuska OK 6.4 ppb 84/100
60 74343 Fairland OK 6.4 ppb 90/100
61 74653 Tonkawa OK 6.4 ppb 86/100
62 74522 Alderson OK 6.4 ppb 66/100
63 74528 Blanco OK 6.4 ppb 73/100
64 74545 Gowen OK 6.4 ppb 66/100
65 74546 Haileyville OK 6.4 ppb 89/100
66 74547 Hartshorne OK 6.4 ppb 61/100
67 74560 Pittsburg OK 6.4 ppb 46/100
68 73075 Pauls Valley OK 6.3 ppb 65/100
69 74851 Mcloud OK 6.2 ppb 88/100
70 74857 Newalla OK 6.2 ppb 65/100
71 73032 Dougherty OK 6.0 ppb 91/100
72 73077 Perry OK 6.0 ppb 68/100
73 74337 Chouteau OK 6.0 ppb 80/100
74 73646 Fay OK 5.9 ppb 66/100
75 73737 Fairview OK 5.9 ppb 65/100
76 73838 Chester OK 5.9 ppb 66/100
77 74066 Sapulpa OK 5.9 ppb 63/100
78 74067 Sapulpa OK 5.9 ppb 78/100
79 73560 Olustee OK 5.9 ppb 63/100
80 73654 Leedey OK 5.8 ppb 94/100
81 73667 Taloga OK 5.8 ppb 60/100
82 74881 Wellston OK 5.7 ppb 64/100
83 73014 Calumet OK 5.6 ppb 69/100
84 73040 Geary OK 5.6 ppb 76/100
85 73079 Pocasset OK 5.6 ppb 90/100
86 73098 Wynnewood OK 5.6 ppb 70/100
87 74434 Fort Gibson OK 5.6 ppb 82/100
88 73566 Snyder OK 5.5 ppb 64/100
89 73753 Kremlin OK 5.4 ppb 70/100
90 73842 Freedom OK 5.4 ppb 97/100
91 74401 Muskogee OK 5.4 ppb 69/100
92 74402 Muskogee OK 5.4 ppb 65/100
93 74403 Muskogee OK 5.4 ppb 59/100
94 74960 Stilwell OK 5.4 ppb 77/100
95 74940 Howe OK 5.3 ppb 93/100
96 73521 Altus OK 5.2 ppb 70/100
97 73522 Altus OK 5.2 ppb 65/100
98 73041 Gotebo OK 5.1 ppb 98/100
99 73433 Elmore City OK 5.1 ppb 99/100
100 73701 Enid OK 5.1 ppb 83/100

Methodology

Lead rankings are based on the 90th percentile lead testing value (PB90) reported by water systems under the Lead and Copper Rule. When CCR data is unavailable, EPA SDWIS lead sampling data is used. The EPA action level for lead is 15 ppb (0.015 mg/L). There is no safe level of lead exposure.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.

Frequently Asked Questions

What is a dangerous lead level in water?

The EPA action level is 15 parts per billion (ppb). The American Academy of Pediatrics recommends no more than 1 ppb for school drinking water. There is no safe level of lead exposure for children.

How is lead measured in water?

Water systems collect samples from homes with known lead service lines or lead solder. The 90th percentile value (PB90) means 90% of samples tested below that level. If PB90 exceeds 15 ppb, the system must take corrective action.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

Related Rankings

Water Safety 2026 EPA violations and water quality scores Infrastructure 2026 Aging pipes and remediation burden Home Safety 2026 Combined safety score across all hazards
Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

Get safety alerts for Oklahoma

Free updates when EPA data changes for this area. No spam.

Unsubscribe anytime. Privacy Policy.

Share This Page

X Facebook
Check your water filter options Free tool — no phone call required.