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F0/100

CITY OF MASON — Water Quality Report 2026

Serving 2,228 people · Texas

Water Source
Groundwater
County
—
System ID
TX1600001
Violations
147

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.002 mg/L0.015 mg/LAbove Goal

EPA Violation History

8

Violations (last 5yr)

1

Unresolved

6

Health-Related

TIER 3Unresolved

Failed to conduct Level 1 Assessment

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: November 27, 2024Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: October 1, 2022 – December 31, 2022Enforcement: Formal — state order issued
TIER 3Resolved

Monitoring / Reporting Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 1, 2022 – December 31, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: April 1, 2022 – June 30, 2022Enforcement: Formal — state order issued
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: January 1, 2022 – March 31, 2022Enforcement: Formal — state order issued
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: October 1, 2021 – December 31, 2021Enforcement: Formal — state order issued
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

When: July 1, 2021 – September 30, 2021Enforcement: Formal — state order issued
TIER 2Resolved

Exceeded the Maximum Contaminant Level (running average)

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 CITY OF MASON

Is CITY OF MASON water safe to drink?

CITY OF MASON water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 147 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has CITY OF MASON detected?

1 contaminants were tested in CITY OF MASON's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).

Does CITY OF MASON have any EPA violations?

Yes, CITY OF MASON has 147 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL, Other. 115 are health-based violations.

How many people does CITY OF MASON serve?

CITY OF MASON serves approximately 2,228 people, Texas.

What type of water does CITY OF MASON provide?

CITY OF MASON sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TX1600001.

How does CITY OF MASON compare to other utilities in Texas?

CITY OF MASON scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Texas state page for a full comparison of water systems.