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South Mountain, TX Tap Water Quality 2026

Water quality report for South Mountain, TX — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at South Mountain's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Mountain Wsc PWSID: TX0500020 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS has never been sampled at this system.

C

South Mountain earns a C for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: not detected
PFAS never sampled at this system
17 violations since 2015, 10 health-based
No violations currently open
South Mountain's lead level vs. all Texas community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Texas utilities
Population Served
411
~802 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
17 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
146.2% of EPA action level
1,900 ppb
Action level: 1,300 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.079 MG/L 0.060 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.096 MG/L 0.080 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.126 MG/L 0.060 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.124 MG/L 0.080 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.121 MG/L 0.060 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.124 MG/L 0.080 mg/L 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.117 MG/L 0.060 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.125 MG/L 0.080 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2015 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.068 MG/L 0.060 mg/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

17 violations are on record since 2015, of which 10 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Mountain Wsc
PWSID TX0500020
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 411
Service connections 802
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is South Mountain tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does South Mountain water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to South Mountain? ▼
Mountain Wsc (PWSID TX0500020). Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2023-12-21. No significant deficiencies were recorded.

What Should South Mountain Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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