GRANDFIELD

GRANDFIELD (PWSID OK2007103) is a cws water system drawing from a surface water source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 1,110 people in Grandfield, OK, and is subject to primacy enforcement by the Oklahoma drinking-water program.

The system's federal compliance record contains 262 total violations, with 262 classified as health-based (MCL exceedances or treatment-technique failures). 4 distinct contaminants have been cited, including Nitrite, Total Trihalomethanes (TTHM), Nitrate. Recorded violations span 1978–2025.

A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Oklahoma state drinking-water program's public portal.