This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 1, 2024 – December 31, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: November 1, 2024 – November 30, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Treatment technique violation
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – January 9, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – April 30, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: October 2, 2022 – January 5, 2024Enforcement: Resolving — corrective action underway
TIER 1 — URGENTResolved
Violation related to Nitrate
When: June 1, 2022 – June 30, 2022Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – January 9, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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 MAYES CO RWD # 9
Is MAYES CO RWD # 9 water safe to drink?
MAYES CO RWD # 9 water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 120 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MAYES CO RWD # 9 detected?
1 contaminants were tested in MAYES CO RWD # 9's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does MAYES CO RWD # 9 have any EPA violations?
Yes, MAYES CO RWD # 9 has 120 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MON. 23 are health-based violations.
How many people does MAYES CO RWD # 9 serve?
MAYES CO RWD # 9 serves approximately 2,578 people, Oklahoma.
What type of water does MAYES CO RWD # 9 provide?
MAYES CO RWD # 9 sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OK1021678.
How does MAYES CO RWD # 9 compare to other utilities in Oklahoma?
MAYES CO RWD # 9 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.