Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2025 – September 30, 2025Enforcement: Informal — resolved cooperativelyVerify 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 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: October 1, 2023 – December 31, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2023 – September 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2023 – June 30, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: January 1, 2023 – March 31, 2023Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: October 1, 2022 – December 31, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2022 – September 30, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: April 1, 2022 – June 30, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: January 1, 2022 – March 31, 2022Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: October 1, 2021 – December 31, 2021Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTUnresolved
Exceeded the Maximum Contaminant Level (single sample)
When: July 1, 2021 – September 30, 2021Enforcement: Formal — state order issuedVerify on EPA.gov
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 OKARCHE
Is OKARCHE water safe to drink?
OKARCHE water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 98 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has OKARCHE detected?
2 contaminants were tested in OKARCHE's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does OKARCHE have any EPA violations?
Yes, OKARCHE has 98 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, MR, Other. 93 are health-based violations.
How many people does OKARCHE serve?
OKARCHE serves approximately 1,110 people, Oklahoma.
What type of water does OKARCHE provide?
OKARCHE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is OK2003703.
How does OKARCHE compare to other utilities in Oklahoma?
OKARCHE 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.