Water Quality in CORTEZ, CO (81321)

EPA violation data for public water systems serving ZIP code 81321.

235

Total Violations

16

Health-Based

219

Monitoring / Reporting

192

Resolved

What does this mean?

192 of 235 violations have been resolved. 16 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 219 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: 7 Population served: 9,780

Violations Detail (235 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Lead and Copper RuleMonitoringN/AN/ASep 30, 2025ActiveN/A
Lead and Copper RuleMonitoringN/AN/ASep 30, 2025ActiveN/A
Lead and Copper RuleMonitoringN/AN/ASep 30, 2025ActiveN/A
Lead and Copper RuleMonitoringN/AN/ASep 30, 2025ActiveN/A
Public NoticeMonitoringN/AN/ASep 7, 2025ActiveN/A
Public NoticeMonitoringN/AN/ASep 7, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ActiveN/A
Lead and Copper RuleMonitoringN/AN/AJun 30, 2025ActiveN/A

Lead & Copper Levels

Violation Timeline

2025(41)

Lead and Copper Rule

66

Sep 30Active

Lead and Copper Rule

66

Sep 30Active

Lead and Copper Rule

66

Sep 30Active

Lead and Copper Rule

66

Sep 30Active

Public Notice

75

Sep 7Active

Public Notice

75

Sep 7Active

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Active

Lead and Copper Rule

51

Jun 30Active

Lead and Copper Rule

51

Jun 30Active

Lead and Copper Rule

51

Jun 30Active

Lead and Copper Rule

51

Jun 30Active

Public Notice

75

Jun 7Active

Public Notice

75

Jun 7Active

Revised Total Coliform Rule

5A

Apr 10Active

Revised Total Coliform Rule

5A

Apr 10Active

Stage 2 Disinfectants and Disinfection Byproducts Rule

35

Apr 10Active

Stage 2 Disinfectants and Disinfection Byproducts Rule

35

Apr 10Active

Revised Total Coliform Rule

5A

Apr 10Active

Revised Total Coliform Rule

5A

Apr 10Active

Stage 2 Disinfectants and Disinfection Byproducts Rule

35

Apr 10Active

Stage 2 Disinfectants and Disinfection Byproducts Rule

35

Apr 10Active

Public Notice

75

Mar 7Active

Public Notice

75

Mar 7Active

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Surface Water Treatment Rule

36

Feb 28Resolved

Surface Water Treatment Rule

36

Feb 28Resolved

Surface Water Treatment Rule

36

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Public Notice

75

Feb 13Resolved

Public Notice

75

Feb 13Resolved

Public Notice

75

Feb 13Resolved

Public Notice

75

Feb 13Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Surface Water Treatment Rule

36

Jan 31Resolved

Surface Water Treatment Rule

36

Jan 31Resolved

Surface Water Treatment Rule

36

Jan 31Resolved

2024(55)

Lead and Copper Rule

66

Dec 31Active

Lead and Copper Rule

66

Dec 31Active

Lead and Copper Rule

66

Dec 31Active

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Surface Water Treatment Rule

36

Dec 31Resolved

Surface Water Treatment Rule

36

Dec 31Resolved

Surface Water Treatment Rule

36

Dec 31Resolved

Chlorine

27

Dec 31Resolved

Chlorine

27

Dec 31Resolved

Chlorine

27

Dec 31Resolved

Public Notice

75

Dec 7Active

Public Notice

75

Dec 7Active

Surface Water Treatment Rule

36

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Surface Water Treatment Rule

36

Nov 30Resolved

Surface Water Treatment Rule

36

Nov 30Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Surface Water Treatment Rule

36

Oct 31Resolved

Surface Water Treatment Rule

36

Oct 31Resolved

Surface Water Treatment Rule

36

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Surface Water Treatment Rule

36

Oct 31Resolved

Surface Water Treatment Rule

36

Oct 31Resolved

Surface Water Treatment Rule

36

Oct 31Resolved

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Active

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Active

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Active

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Active

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Active

LEAD AND COPPER RULE REVISIONS

2E

Oct 16Active

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Active

How Does This Compare?

CORTEZ (81321) has 235 recorded violations, including 16 health-based. 43 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

NSF Certified Products → EPA Safe Drinking Water Guide →

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

NSF Certified Products → EPA Safe Drinking Water Guide →

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

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