GRANDFIELD

PWSID: OK2007103 · Grandfield, OK · Serves 1,110 people

According to EPA Safe Drinking Water Information System (SDWIS), GRANDFIELD (PWSID OK2007103) in Grandfield, OK is listed as a CWS water system covering about 1,110 people. The same extract lists 264 health-based violation records spanning 1978-2025. Those 264 health-based rows for GRANDFIELD cover contaminants such as Nitrate-Nitrite, TTHM, Nitrate; they remain historical EPA registry entries, not a current compliance or drinkability score.

View saved records
Health-Based Records

GRANDFIELD has 264 health-based violation records in this historical extract. Monitoring and reporting records are not included.

Population Served
1,110
Health-Based Violation Records
264
Distinct Contaminant Codes
4
Source Type
Surface Water

PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 4 distinct EPA contaminant codes appear in this system's record, including Nitrate-Nitrite, TTHM, Nitrate. Recorded violations span 1978–2025. Day-to-day primacy enforcement for this system runs through the Oklahoma drinking-water program, not EPA directly.

A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current 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.

System Details

EPA ID (PWSID)
OK2007103
System Type
CWS
Water Source
Surface Water
Location
Grandfield, OK
Population Served
1,110
Health Violations
Yes (264)

What contaminants are in this water system?

Contaminant Violations Health-Based
Nitrate-Nitrite 141 141
TTHM 114 114
Nitrate 8 8
Coliform (TCR) 1 1

Violation History (264)

Contaminant Health Date
Nitrate-Nitrite Yes Oct 1, 2025
Nitrate-Nitrite Yes Jul 1, 2025
Nitrate-Nitrite Yes Apr 1, 2025
Nitrate-Nitrite Yes Jan 1, 2025
Nitrate-Nitrite Yes Oct 1, 2024
Nitrate-Nitrite Yes Oct 1, 2024
Nitrate-Nitrite Yes Jul 1, 2024
Nitrate-Nitrite Yes Jul 1, 2024
Nitrate-Nitrite Yes Apr 1, 2024
Nitrate-Nitrite Yes Apr 1, 2024
TTHM Yes Jan 1, 2024
TTHM Yes Jan 1, 2024
TTHM Yes Jan 1, 2024
TTHM Yes Oct 1, 2023
TTHM Yes Oct 1, 2023
TTHM Yes Oct 1, 2023
TTHM Yes Oct 1, 2023
TTHM Yes Jul 1, 2023
TTHM Yes Jul 1, 2023
TTHM Yes Jul 1, 2023
TTHM Yes Jul 1, 2023
Nitrate-Nitrite Yes Apr 1, 2023
Nitrate-Nitrite Yes Apr 1, 2023
Nitrate-Nitrite Yes Apr 1, 2023
Nitrate-Nitrite Yes Apr 1, 2023
TTHM Yes Apr 1, 2023
TTHM Yes Apr 1, 2023
TTHM Yes Apr 1, 2023
TTHM Yes Apr 1, 2023
Nitrate-Nitrite Yes Jan 1, 2023
Nitrate-Nitrite Yes Jan 1, 2023
Nitrate-Nitrite Yes Jan 1, 2023
Nitrate-Nitrite Yes Jan 1, 2023
TTHM Yes Jan 1, 2023
TTHM Yes Jan 1, 2023
TTHM Yes Jan 1, 2023
TTHM Yes Jan 1, 2023
Nitrate-Nitrite Yes Oct 1, 2022
Nitrate-Nitrite Yes Oct 1, 2022
Nitrate-Nitrite Yes Oct 1, 2022
Nitrate-Nitrite Yes Oct 1, 2022
TTHM Yes Oct 1, 2022
TTHM Yes Oct 1, 2022
TTHM Yes Oct 1, 2022
TTHM Yes Oct 1, 2022
Nitrate-Nitrite Yes Jul 1, 2022
Nitrate-Nitrite Yes Jul 1, 2022
Nitrate-Nitrite Yes Jul 1, 2022
TTHM Yes Jul 1, 2022
TTHM Yes Jul 1, 2022
TTHM Yes Jul 1, 2022
Nitrate-Nitrite Yes Apr 1, 2022
Nitrate-Nitrite Yes Apr 1, 2022
Nitrate-Nitrite Yes Apr 1, 2022
Nitrate-Nitrite Yes Apr 1, 2022
Nitrate-Nitrite Yes Jan 1, 2022
Nitrate-Nitrite Yes Jan 1, 2022
Nitrate-Nitrite Yes Jan 1, 2022
TTHM Yes Jan 1, 2022
TTHM Yes Jan 1, 2022
TTHM Yes Jan 1, 2022
Nitrate-Nitrite Yes Oct 1, 2021
Nitrate-Nitrite Yes Oct 1, 2021
Nitrate-Nitrite Yes Oct 1, 2021
Nitrate-Nitrite Yes Jul 1, 2021
Nitrate-Nitrite Yes Jul 1, 2021
Nitrate-Nitrite Yes Jul 1, 2021
Nitrate-Nitrite Yes Apr 1, 2021
Nitrate-Nitrite Yes Apr 1, 2021
Nitrate-Nitrite Yes Apr 1, 2021
TTHM Yes Apr 1, 2021
TTHM Yes Apr 1, 2021
TTHM Yes Apr 1, 2021
Nitrate-Nitrite Yes Jan 1, 2021
Nitrate-Nitrite Yes Jan 1, 2021
Nitrate-Nitrite Yes Jan 1, 2021
TTHM Yes Jan 1, 2021
TTHM Yes Jan 1, 2021
Nitrate-Nitrite Yes Oct 1, 2020
Nitrate-Nitrite Yes Oct 1, 2020
Nitrate-Nitrite Yes Oct 1, 2020
TTHM Yes Oct 1, 2020
TTHM Yes Oct 1, 2020
TTHM Yes Oct 1, 2020
Nitrate-Nitrite Yes Jul 1, 2020
Nitrate-Nitrite Yes Jul 1, 2020
Nitrate-Nitrite Yes Jul 1, 2020
TTHM Yes Jul 1, 2020
TTHM Yes Jul 1, 2020
Nitrate-Nitrite Yes Apr 1, 2020
Nitrate-Nitrite Yes Apr 1, 2020
Nitrate-Nitrite Yes Apr 1, 2020
TTHM Yes Apr 1, 2020
TTHM Yes Apr 1, 2020
Nitrate-Nitrite Yes Jan 1, 2020
Nitrate-Nitrite Yes Jan 1, 2020
Nitrate-Nitrite Yes Jan 1, 2020
Nitrate-Nitrite Yes Oct 1, 2019
Nitrate-Nitrite Yes Oct 1, 2019
Nitrate-Nitrite Yes Oct 1, 2019
Showing 100 of 264 violations.

Frequently Asked Questions

What does EPA SDWIS list for GRANDFIELD?
GRANDFIELD has 264 health-based violation records in this historical extract. Monitoring and reporting records are not included. The system uses surface water water as its source.
How many people does GRANDFIELD serve?
GRANDFIELD serves 1,110 people in Grandfield, OK. It is classified as a CWS water system.
What violations does GRANDFIELD have?
GRANDFIELD has 264 health-based violation records in PlainEnviro's extract spanning 1978–2025. Monitoring and reporting records are not included.
What contaminants have been found in GRANDFIELD water?
Violations have been recorded for 4 contaminants. The most frequent: Nitrate-Nitrite, TTHM, Nitrate.

Compare beyond Oklahoma

Nationwide peers by violations & population served

Cross-state SDWIS systems nearest GRANDFIELD on cumulative violation count (264) and EPA-reported population served (1,110). Violation-count peers include VIXEN WATER SYSTEM, CAMINO REAL REGIONAL UTILITY AUTHORITY, SOUTH SWINK WATER AUTHORITY. Population peers include OGDEN DUNES WATER, POINT MARION BORO, SENDERA RANCH.

About This Data

GRANDFIELD (OK2007103) is drawn from EPA SDWIS. Nearby county systems in this extract include FREDERICK; TIPTON; DAVIDSON; MANITOU. Health-based rows (264 MCL/TT) are historical registry state, not a current drinkability score.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Related