Water Quality in CANYON LAKE, TX (78133)

EPA violation data for public water systems serving ZIP code 78133.

485

Total Violations

56

Health-Based

429

Monitoring / Reporting

477

Resolved

What does this mean?

477 of 485 violations have been resolved. 56 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 429 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 61 Population served: 100,951

Violations Detail (485 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Public NoticeMonitoringN/AN/ASep 19, 2025ActiveN/A
Revised Total Coliform RuleMonitoringN/AN/AAug 31, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AAug 2, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AAug 2, 2025ResolvedN/A
TTHMHealth-BasedN/A0.113Jun 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(30)

Public Notice

75

Sep 19Active

Revised Total Coliform Rule

3A

Aug 31Resolved

Public Notice

75

Aug 2Resolved

Public Notice

75

Aug 2Resolved

TTHM

02

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

43

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

43

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

43

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

43

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

44

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

44

Jun 30Resolved

TTHM

02

Jun 30Resolved

Public Notice

75

Jun 20Resolved

Public Notice

75

Jun 20Resolved

Revised Total Coliform Rule

1A

May 31Resolved

Revised Total Coliform Rule

1A

May 31Resolved

Revised Total Coliform Rule

1A

May 31Resolved

Revised Total Coliform Rule

1A

May 31Resolved

Revised Total Coliform Rule

1A

May 31Resolved

Public Notice

75

May 14Active

Public Notice

75

Apr 30Resolved

Public Notice

75

Apr 30Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

TTHM

35

Feb 3Resolved

TTHM

35

Feb 3Resolved

TTHM

35

Feb 3Resolved

2024(35)

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Public Notice

75

Apr 30Active

Public Notice

75

Jan 31Resolved

Public Notice

75

Jan 31Resolved

How Does This Compare?

CANYON LAKE (78133) has 485 recorded violations, including 56 health-based. 8 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 certified

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Nearby ZIP Codes

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