Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2025 – September 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: January 1, 2025 – March 31, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: October 1, 2024 – December 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2024 – September 30, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2024 – June 30, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2023 – March 19, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 29, 2023 – March 19, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2023 – September 30, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 30, 2023 – September 14, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – July 3, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2023 – June 30, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issued
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2023 – March 31, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: January 1, 2023 – March 31, 2023Enforcement: Formal — state order issued
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2022 – July 3, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2022 – December 31, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: October 1, 2022 – December 31, 2022Enforcement: Formal — state order issued
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2022 – September 30, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2022 – September 30, 2022Enforcement: Formal — state order issued
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2022 – June 30, 2022Enforcement: Formal — state order issued
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: January 1, 2022 – March 31, 2022Enforcement: Formal — state order issued
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: October 1, 2021 – December 31, 2021Enforcement: Formal — state order issued
TIER 1 — URGENTResolved
Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2021 – September 30, 2021Enforcement: Formal — state order issued
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About GRANDFIELD
Is GRANDFIELD water safe to drink?
GRANDFIELD water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 212 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has GRANDFIELD detected?
1 contaminants were tested in GRANDFIELD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does GRANDFIELD have any EPA violations?
Yes, GRANDFIELD has 212 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, MR. 151 are health-based violations.
How many people does GRANDFIELD serve?
GRANDFIELD serves approximately 1,110 people, Oklahoma.
What type of water does GRANDFIELD provide?
GRANDFIELD sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OK2007103.
How does GRANDFIELD compare to other utilities in Oklahoma?
GRANDFIELD scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Oklahoma state page for a full comparison of water systems.