C50/100
NEWCASTLE — Water Quality Report 2026
Serving 7,900 people · Oklahoma
Water Source
Purchased Surface Water
County
—
System ID
OK2004704
Violations
27
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
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: June 1, 2025 – June 30, 2025Rule: Stage 1 DBPREnforcement: 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: February 1, 2022 – January 31, 2023Rule: Stage 2 DBPREnforcement: 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: February 1, 2022 – January 31, 2023Rule: Stage 2 DBPREnforcement: 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 NEWCASTLE
Is NEWCASTLE water safe to drink?
NEWCASTLE water receives a grade of C (50/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 27 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has NEWCASTLE detected?
31 contaminants were tested in NEWCASTLE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does NEWCASTLE have any EPA violations?
Yes, NEWCASTLE has 27 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL. 5 are health-based violations.
How many people does NEWCASTLE serve?
NEWCASTLE serves approximately 7,900 people, Oklahoma.
What type of water does NEWCASTLE provide?
NEWCASTLE 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 OK2004704.
How does NEWCASTLE compare to other utilities in Oklahoma?
NEWCASTLE scores 50/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Oklahoma state page for a full comparison of water systems.