STATE REPORT OK 3 ALERTS 1376 HEALTH VIOLATIONS

Oklahoma Water Quality & Safety Report

48 ZIP codes · 145 water systems · IPC plumbing code · Updated 2026-03-16

Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-03-16

ZIP Codes

145

Water Systems

ZIPs with Violations

Active Alerts

IPC

Plumbing Code

Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 48 ZIP codes across Oklahoma, covering 145 community water systems that serve approximately 2,019,560 people.

47 of 48 ZIP codes (98%) have recorded EPA violations. 1376 health-based violations have been documented.

Active Weather Alerts

3 active alerts in Oklahoma including 2 warnings. Severe weather can directly affect tap water quality — flooding, power outages, and infrastructure damage may lead to boil-water advisories.

Alert	Severity	Areas
Fire Weather Watch	Severe	Harper; Woods; Alfalfa; Ellis; Woodward; Major; Garfield;…
Freeze Warning	Moderate	Sevier; Howard; Little River; Hempstead; Miller; McCurtai…
Freeze Warning	Moderate	Sevier; Howard; Little River; Hempstead; Miller; McCurtai…

View all Oklahoma alerts →

Plumbing Regulations

Oklahoma follows the International Plumbing Code (2018 edition).

Plumbing code: IPC (2018)
Homeowner DIY: Licensed plumber required
Water heater permit: Required
Annual backflow test: Required

Full Oklahoma regulations →

Areas with Most Violations

ZIP Code	City	Safety Score	Violations	Health-Based	System
74344	Grove	—	668	5	GROVE MUNICIPAL SERVICES AUTH.
73644	Elk City	—	542	2	ELK CITY
74467	Wagoner	—	391	251	WAGONER
73401	Ardmore	—	325	97	ARDMORE
73701	Enid	—	316	2	ENID
73011	Bradley	—	307	1	GRADY CO RWD #3
73004	Amber	—	304	18	GRADY CO RWD #6
73085	Yukon	—	201	0	YUKON
74401	Muskogee	—	190	176	MUSKOGEE
74525	Atoka	—	188	147	ATOKA CO. RWS & SWMD #4

Areas with No Violations

ZIP Code	City	Safety Score	System	Population
74818	Seminole	—	SEMINOLE	6,899

Lead & Copper

0 ZIP codes exceed the EPA lead action level

Radon Risk

High risk (Zone 1): 0 ZIP codes (0%)
Moderate risk (Zone 2): 0 ZIP codes
Low risk (Zone 3): 0 ZIP codes

All 48 ZIP Codes in Oklahoma

74820 (Ada) — 3 violations ⚠
73002 (Alex) — 104 violations ⚠
73521 (Altus) — 149 violations ⚠
73004 (Amber) — 304 violations ⚠
73005 (Anadarko) — 86 violations ⚠
73006 (Apache) — 84 violations ⚠
73007 (Arcadia) — 31 violations ⚠
73401 (Ardmore) — 325 violations ⚠
74525 (Atoka) — 188 violations ⚠
74003 (Bartlesville) — 137 violations ⚠
73008 (Bethany) — 25 violations ⚠
73009 (Binger) — 17 violations ⚠
73010 (Blanchard) — 39 violations ⚠
73011 (Bradley) — 307 violations ⚠
74423 (Braggs) — 11 violations
74011 (Broken Arrow) — 84 violations ⚠
73014 (Calumet) — 57 violations ⚠
73015 (Carnegie) — 6 violations ⚠
73016 (Cashion) — 4 violations
73017 (Cement) — 10 violations ⚠
73018 (Chickasha) — 50 violations ⚠
73020 (Choctaw) — 108 violations
74017 (Claremore) — 31 violations ⚠
73021 (Colony) — 2 violations ⚠
73030 (Davis) — 42 violations ⚠
73533 (Duncan) — 33 violations ⚠
74701 (Durant) — 39 violations ⚠
73003 (Edmond) — 84 violations ⚠
73644 (Elk City) — 542 violations ⚠
73701 (Enid) — 316 violations ⚠
74344 (Grove) — 668 violations ⚠
73501 (Lawton) — 23 violations
74501 (Mcalester) — 121 violations ⚠
74354 (Miami) — 140 violations ⚠
74401 (Muskogee) — 190 violations ⚠
73019 (Norman) — 146 violations ⚠
73101 (Oklahoma City) — 20 violations
74601 (Ponca City) — 12 violations ⚠
74361 (Pryor) — 2 violations ⚠
74066 (Sapulpa) — 16 violations ⚠
74818 (Seminole)
74801 (Shawnee) — 117 violations ⚠
74074 (Stillwater) — 35 violations ⚠
74464 (Tahlequah) — 16 violations ⚠
74101 (Tulsa) — 17 violations ⚠
74467 (Wagoner) — 391 violations ⚠
73801 (Woodward) — 166 violations ⚠
73085 (Yukon) — 201 violations

Data Sources

Water quality: EPA Safe Drinking Water Information System (SDWIS)
Weather alerts: National Weather Service (NWS)
Regulations: State plumbing boards, ICC, IAPMO
Rebates: Rewiring America

Updated daily.

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