Is Enid, OK tap water safe?

Data: U.S. EPA · How we read the data · How we check it

No federal limits exceeded in EPA data for Enid Water System.

2 public water systems serve parts of Enid. The largest, Enid Water System, serves 49,347 people. Your water bill names your system.

Largest system

Enid Water System

49,347 people · Surface water · EPA ID OK2002412

PFAS	Highest average	Limit	Status
PFOA Not detected	–	4 ppt	Not detected
PFOS Not detected	–	4 ppt	Not detected
PFHxS Not detected	–	10 ppt	Not detected
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 5.1 ppb at the 90th percentile (Dec 2024, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 1

Across Oklahoma, 8 of 167 water systems EPA tested had PFAS above a 2024 federal limit, and 5 systems were above the lead action level in results from the last five years. Oklahoma results.

Enid homes and lead pipes

70%

of homes built before 1980 (Oklahoma 49%, US 50%)

23%

built before 1950 (Oklahoma 12%)

39%

of households rent (Oklahoma 34%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Enid city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Enid

Bryan County Rws & Swmd #2
6,270 people · Surface water · Oklahoma · reported ZIPs here
Total trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violation

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Stillwater 48 mi Stillwater Utilities Authority	Stillwater Utilities Authority	Above limit	2.6 ppb
Edmond 57 mi Edmond Public Works Authority	Edmond Public Works Authority	None above limits	0 ppb
Yukon 62 mi Yukon Water System	Yukon Water System	None above limits	0 ppb
Oklahoma City 68 mi Oklahoma City Utilities	Oklahoma City Utilities	None above limits	0 ppb
Midwest City 71 mi Midwest City Water System	Midwest City Water System	None above limits	1.2 ppb
Moore 77 mi Moore Public Works Authority	Moore Public Works Authority	None above limits	0 ppb

Enid ZIP codes (3)

73701
73703
73705

Questions

Is Enid tap water safe to drink?

Enid Water System had 1 health-based violation since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Enid, OK?

2 public water systems serve parts of Enid. The largest is Enid Water System (49,347 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Enid tap water have PFAS?

None detected above EPA's reporting limits. Enid Water System had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Enid homes have lead pipes?

Census estimates put 70% of Enid homes as built before 1980 (Oklahoma: 49%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Enid Water System's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.