D27/100
CITY OF RIO GRANDE CITY — Water Quality Report 2026
Serving 18,912 people · Texas
Water Source
Surface Water
County
—
System ID
TX2140018
Violations
46
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 840.00 µg/L | — | Above Goal |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
2
Health-Related
TIER 1 — URGENTResolved
Violation related to Nitrate
When: July 1, 2023 – July 31, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – November 13, 2023Enforcement: Resolving — corrective action underway
TIER 1 — URGENTResolved
Violation related to Nitrate
When: July 1, 2023 – July 31, 2023Rule: Surface Water Treatment 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 CITY OF RIO GRANDE CITY
Is CITY OF RIO GRANDE CITY water safe to drink?
CITY OF RIO GRANDE CITY water receives a grade of D (27/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 46 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CITY OF RIO GRANDE CITY detected?
69 contaminants were tested in CITY OF RIO GRANDE CITY's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CITY OF RIO GRANDE CITY have any EPA violations?
Yes, CITY OF RIO GRANDE CITY has 46 EPA violation(s) on record, with the most recent in 2023. Violation types include TT, Other, MR. 6 are health-based violations.
How many people does CITY OF RIO GRANDE CITY serve?
CITY OF RIO GRANDE CITY serves approximately 18,912 people, Texas.
What type of water does CITY OF RIO GRANDE CITY provide?
CITY OF RIO GRANDE CITY 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 TX2140018.
How does CITY OF RIO GRANDE CITY compare to other utilities in Texas?
CITY OF RIO GRANDE CITY scores 27/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Texas state page for a full comparison of water systems.