Water Quality in CARBONDALE, CO (81623)

EPA violation data for public water systems serving ZIP code 81623.

764

Total Violations

130

Health-Based

634

Monitoring / Reporting

747

Resolved

What does this mean?

747 of 764 violations have been resolved. 130 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 634 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: 49 Population served: 11,446

Violations Detail (764 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Public NoticeMonitoringN/AN/AJul 30, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 30, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AJul 10, 2025ActiveN/A
Stage 2 Disinfectants and Disinfection Byproducts RuleMonitoringN/AN/AJul 10, 2025ActiveN/A
Stage 2 Disinfectants and Disinfection Byproducts RuleMonitoringN/AN/AJul 10, 2025ActiveN/A
Revised Total Coliform RuleMonitoringN/AN/AJul 10, 2025ActiveN/A
Revised Total Coliform RuleMonitoringN/AN/AJul 10, 2025ActiveN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Consumer Confidence RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(300)

Public Notice

75

Jul 30Resolved

Public Notice

75

Jul 30Resolved

Public Notice

75

Jul 10Active

Stage 2 Disinfectants and Disinfection Byproducts Rule

35

Jul 10Active

Stage 2 Disinfectants and Disinfection Byproducts Rule

35

Jul 10Active

Revised Total Coliform Rule

5A

Jul 10Active

Revised Total Coliform Rule

5A

Jul 10Active

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Active

Consumer Confidence Rule

71

Jun 30Active

Arsenic

03

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Benzene

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Selenium

03

Jun 30Resolved

Selenium

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Mercury

03

Jun 30Resolved

Mercury

03

Jun 30Resolved

Beryllium, Total

03

Jun 30Resolved

Beryllium, Total

03

Jun 30Resolved

Pentachlorophenol

03

Jun 30Resolved

Pentachlorophenol

03

Jun 30Resolved

Chromium

03

Jun 30Resolved

Chromium

03

Jun 30Resolved

Atrazine

03

Jun 30Resolved

Atrazine

03

Jun 30Resolved

Cadmium

03

Jun 30Resolved

Cadmium

03

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Arsenic

03

Jun 30Resolved

Fluoride

03

Jun 30Resolved

Fluoride

03

Jun 30Resolved

Tetrachloroethylene

03

Jun 30Resolved

Tetrachloroethylene

03

Jun 30Resolved

Benzene

03

Jun 30Resolved

Toxaphene

03

Jun 30Resolved

Toxaphene

03

Jun 30Resolved

Dalapon

03

Jun 30Resolved

Dalapon

03

Jun 30Resolved

Endothall

03

Jun 30Resolved

Endothall

03

Jun 30Resolved

OXAMYL

03

Jun 30Resolved

OXAMYL

03

Jun 30Resolved

Simazine

03

Jun 30Resolved

Simazine

03

Jun 30Resolved

Di(2-ethylhexyl) phthalate

03

Jun 30Resolved

Di(2-ethylhexyl) phthalate

03

Jun 30Resolved

Hexachlorocyclopentadiene

03

Jun 30Resolved

Hexachlorocyclopentadiene

03

Jun 30Resolved

Aldicarb sulfoxide

03

Jun 30Resolved

Aldicarb sulfoxide

03

Jun 30Resolved

Carbofuran

03

Jun 30Resolved

Carbofuran

03

Jun 30Resolved

Aldicarb

03

Jun 30Resolved

Aldicarb

03

Jun 30Resolved

LASSO

03

Jun 30Resolved

LASSO

03

Jun 30Resolved

Heptachlor epoxide

03

Jun 30Resolved

Heptachlor epoxide

03

Jun 30Resolved

2,4-D

03

Jun 30Resolved

2,4-D

03

Jun 30Resolved

HEXACHLOROBENZENE

03

Jun 30Resolved

HEXACHLOROBENZENE

03

Jun 30Resolved

Benzo(a)pyrene

03

Jun 30Resolved

Benzo(a)pyrene

03

Jun 30Resolved

Total Polychlorinated Biphenyls (PCB)

03

Jun 30Resolved

Total Polychlorinated Biphenyls (PCB)

03

Jun 30Resolved

ETHYLENE DIBROMIDE

03

Jun 30Resolved

ETHYLENE DIBROMIDE

03

Jun 30Resolved

Chlordane

03

Jun 30Resolved

Chlordane

03

Jun 30Resolved

1,2,4-Trichlorobenzene

03

Jun 30Resolved

1,2,4-Trichlorobenzene

03

Jun 30Resolved

cis-1,2-Dichloroethylene

03

Jun 30Resolved

cis-1,2-Dichloroethylene

03

Jun 30Resolved

DICHLOROMETHANE

03

Jun 30Resolved

p-Dichlorobenzene

03

Jun 30Resolved

p-Dichlorobenzene

03

Jun 30Resolved

1,1-Dichloroethylene

03

Jun 30Resolved

1,1-Dichloroethylene

03

Jun 30Resolved

trans-1,2-Dichloroethylene

03

Jun 30Resolved

trans-1,2-Dichloroethylene

03

Jun 30Resolved

1,1,1-Trichloroethane

03

Jun 30Resolved

1,1,1-Trichloroethane

03

Jun 30Resolved

1,2-Dichloropropane

03

Jun 30Resolved

1,2-Dichloropropane

03

Jun 30Resolved

1,1,2-Trichloroethane

03

Jun 30Resolved

1,1,2-Trichloroethane

03

Jun 30Resolved

CHLOROBENZENE

03

Jun 30Resolved

CHLOROBENZENE

03

Jun 30Resolved

Ethylbenzene

03

Jun 30Resolved

Ethylbenzene

03

Jun 30Resolved

Styrene

03

Jun 30Resolved

Styrene

03

Jun 30Resolved

DICHLOROMETHANE

03

Jun 30Resolved

Carbon tetrachloride

03

Jun 30Resolved

Combined Radium (-226 and -228)

03

Jun 30Resolved

Antimony, Total

03

Jun 30Resolved

Endrin

03

Jun 30Resolved

Endrin

03

Jun 30Resolved

BHC-GAMMA

03

Jun 30Resolved

BHC-GAMMA

03

Jun 30Resolved

Methoxychlor

03

Jun 30Resolved

Methoxychlor

03

Jun 30Resolved

o-Dichlorobenzene

03

Jun 30Resolved

o-Dichlorobenzene

03

Jun 30Resolved

Aldicarb sulfone

03

Jun 30Resolved

Aldicarb sulfone

03

Jun 30Resolved

2,4,5-TP

03

Jun 30Resolved

Antimony, Total

03

Jun 30Resolved

Vinyl chloride

03

Jun 30Resolved

Vinyl chloride

03

Jun 30Resolved

Barium

03

Jun 30Resolved

Barium

03

Jun 30Resolved

Combined Uranium

03

Jun 30Resolved

Combined Uranium

03

Jun 30Resolved

Trichloroethylene

03

Jun 30Resolved

Trichloroethylene

03

Jun 30Resolved

Carbon tetrachloride

03

Jun 30Resolved

Thallium, Total

03

Jun 30Resolved

Nickel

03

Jun 30Resolved

Nickel

03

Jun 30Resolved

Picloram

03

Jun 30Resolved

Picloram

03

Jun 30Resolved

1,2-Dichloroethane

03

Jun 30Resolved

1,2-Dichloroethane

03

Jun 30Resolved

Di(2-ethylhexyl) adipate

03

Jun 30Resolved

Di(2-ethylhexyl) adipate

03

Jun 30Resolved

Gross Alpha, Excl. Radon and U

03

Jun 30Resolved

Gross Alpha, Excl. Radon and U

03

Jun 30Resolved

Diquat

03

Jun 30Resolved

Thallium, Total

03

Jun 30Resolved

Combined Radium (-226 and -228)

03

Jun 30Resolved

Xylenes, Total

03

Jun 30Resolved

Diquat

03

Jun 30Resolved

Dinoseb

03

Jun 30Resolved

Heptachlor

03

Jun 30Resolved

Heptachlor

03

Jun 30Resolved

Xylenes, Total

03

Jun 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

03

Jun 30Resolved

Toluene

03

Jun 30Resolved

Toluene

03

Jun 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

03

Jun 30Resolved

Dinoseb

03

Jun 30Resolved

2,4,5-TP

03

Jun 30Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Jun 1Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Jun 1Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule

12

Jun 1Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Selenium

03

Mar 31Resolved

Selenium

03

Mar 31Resolved

Trichloroethylene

03

Mar 31Resolved

Trichloroethylene

03

Mar 31Resolved

Cadmium

03

Mar 31Resolved

Cadmium

03

Mar 31Resolved

Barium

03

Mar 31Resolved

Barium

03

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Arsenic

03

Mar 31Resolved

Antimony, Total

03

Mar 31Resolved

Antimony, Total

03

Mar 31Resolved

Aldicarb sulfone

03

Mar 31Resolved

Aldicarb sulfone

03

Mar 31Resolved

1,1,2-Trichloroethane

03

Mar 31Resolved

1,1,2-Trichloroethane

03

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Combined Uranium

03

Mar 31Resolved

Combined Uranium

03

Mar 31Resolved

Nickel

03

Mar 31Resolved

Nickel

03

Mar 31Resolved

Beryllium, Total

03

Mar 31Resolved

Beryllium, Total

03

Mar 31Resolved

Thallium, Total

03

Mar 31Resolved

Thallium, Total

03

Mar 31Resolved

BHC-GAMMA

03

Mar 31Resolved

BHC-GAMMA

03

Mar 31Resolved

Dalapon

03

Mar 31Resolved

Dalapon

03

Mar 31Resolved

Diquat

03

Mar 31Resolved

Diquat

03

Mar 31Resolved

Di(2-ethylhexyl) adipate

03

Mar 31Resolved

Di(2-ethylhexyl) adipate

03

Mar 31Resolved

OXAMYL

03

Mar 31Resolved

OXAMYL

03

Mar 31Resolved

Di(2-ethylhexyl) phthalate

03

Mar 31Resolved

Di(2-ethylhexyl) phthalate

03

Mar 31Resolved

Dinoseb

03

Mar 31Resolved

Dinoseb

03

Mar 31Resolved

Hexachlorocyclopentadiene

03

Mar 31Resolved

Hexachlorocyclopentadiene

03

Mar 31Resolved

Aldicarb sulfoxide

03

Mar 31Resolved

Aldicarb sulfoxide

03

Mar 31Resolved

Carbofuran

03

Mar 31Resolved

Carbofuran

03

Mar 31Resolved

Aldicarb

03

Mar 31Resolved

Aldicarb

03

Mar 31Resolved

LASSO

03

Mar 31Resolved

LASSO

03

Mar 31Resolved

Heptachlor epoxide

03

Mar 31Resolved

Heptachlor epoxide

03

Mar 31Resolved

2,4-D

03

Mar 31Resolved

2,4-D

03

Mar 31Resolved

2,4,5-TP

03

Mar 31Resolved

2,4,5-TP

03

Mar 31Resolved

HEXACHLOROBENZENE

03

Mar 31Resolved

HEXACHLOROBENZENE

03

Mar 31Resolved

Pentachlorophenol

03

Mar 31Resolved

Pentachlorophenol

03

Mar 31Resolved

Total Polychlorinated Biphenyls (PCB)

03

Mar 31Resolved

Total Polychlorinated Biphenyls (PCB)

03

Mar 31Resolved

ETHYLENE DIBROMIDE

03

Mar 31Resolved

ETHYLENE DIBROMIDE

03

Mar 31Resolved

1,2,4-Trichlorobenzene

03

Mar 31Resolved

1,2,4-Trichlorobenzene

03

Mar 31Resolved

DICHLOROMETHANE

03

Mar 31Resolved

DICHLOROMETHANE

03

Mar 31Resolved

o-Dichlorobenzene

03

Mar 31Resolved

o-Dichlorobenzene

03

Mar 31Resolved

p-Dichlorobenzene

03

Mar 31Resolved

p-Dichlorobenzene

03

Mar 31Resolved

1,1-Dichloroethylene

03

Mar 31Resolved

1,1-Dichloroethylene

03

Mar 31Resolved

1,2-Dichloropropane

03

Mar 31Resolved

1,2-Dichloropropane

03

Mar 31Resolved

CHLOROBENZENE

03

Mar 31Resolved

CHLOROBENZENE

03

Mar 31Resolved

Toluene

03

Mar 31Resolved

Toluene

03

Mar 31Resolved

Ethylbenzene

03

Mar 31Resolved

Ethylbenzene

03

Mar 31Resolved

Styrene

03

Mar 31Resolved

Styrene

03

Mar 31Resolved

Fluoride

03

Mar 31Resolved

Tetrachloroethylene

03

Mar 31Resolved

Gross Alpha, Excl. Radon and U

03

Mar 31Resolved

Endrin

03

Mar 31Resolved

Endrin

03

Mar 31Resolved

Vinyl chloride

03

Mar 31Resolved

Vinyl chloride

03

Mar 31Resolved

Endothall

03

Mar 31Resolved

Endothall

03

Mar 31Resolved

Methoxychlor

03

Mar 31Resolved

Methoxychlor

03

Mar 31Resolved

trans-1,2-Dichloroethylene

03

Mar 31Resolved

trans-1,2-Dichloroethylene

03

Mar 31Resolved

Chromium

03

Mar 31Resolved

Benzo(a)pyrene

03

Mar 31Resolved

Benzo(a)pyrene

03

Mar 31Resolved

Xylenes, Total

03

Mar 31Resolved

Xylenes, Total

03

Mar 31Resolved

Chromium

03

Mar 31Resolved

1,2-Dichloroethane

03

Mar 31Resolved

1,2-Dichloroethane

03

Mar 31Resolved

Simazine

03

Mar 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

03

Mar 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

03

Mar 31Resolved

Mercury

03

Mar 31Resolved

Mercury

03

Mar 31Resolved

Simazine

03

Mar 31Resolved

cis-1,2-Dichloroethylene

03

Mar 31Resolved

Chlorine

27

Mar 31Resolved

Chlorine

27

Mar 31Resolved

Chlorine

27

Mar 31Resolved

cis-1,2-Dichloroethylene

03

Mar 31Resolved

Benzene

03

Mar 31Resolved

Combined Radium (-226 and -228)

03

Mar 31Resolved

Combined Radium (-226 and -228)

03

Mar 31Resolved

Heptachlor

03

Mar 31Resolved

Heptachlor

03

Mar 31Resolved

Benzene

03

Mar 31Resolved

1,1,1-Trichloroethane

03

Mar 31Resolved

1,1,1-Trichloroethane

03

Mar 31Resolved

Chlordane

03

Mar 31Resolved

Chlordane

03

Mar 31Resolved

Nitrate

03

Mar 31Resolved

Nitrate

03

Mar 31Resolved

Carbon tetrachloride

03

Mar 31Resolved

Carbon tetrachloride

03

Mar 31Resolved

Atrazine

03

Mar 31Resolved

Picloram

03

Mar 31Resolved

Picloram

03

Mar 31Resolved

Toxaphene

03

Mar 31Resolved

Toxaphene

03

Mar 31Resolved

Atrazine

03

Mar 31Resolved

Gross Alpha, Excl. Radon and U

03

Mar 31Resolved

Tetrachloroethylene

03

Mar 31Resolved

Fluoride

03

Mar 31Resolved

Public Notice

75

Mar 5Resolved

Public Notice

75

Mar 5Resolved

2024(106)

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) phthalate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Di(2-ethylhexyl) adipate

03

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Active

Lead and Copper Rule

66

Dec 31Active

Chlorine

27

Dec 31Resolved

Chlorine

27

Dec 31Resolved

Chlorine

27

Dec 31Resolved

Chlorine

27

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

Revised Total Coliform Rule

4B

Dec 31Resolved

TTHM

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

TTHM

27

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

Total Haloacetic Acids (HAA5)

27

Dec 31Resolved

TTHM

27

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

Public Notice

76

Dec 14Active

Public Notice

75

Dec 5Resolved

Public Notice

75

Dec 5Resolved

Public Notice

76

Nov 18Resolved

Public Notice

76

Nov 18Resolved

Public Notice

76

Nov 18Resolved

Lead and Copper Rule

52

Sep 30Active

Lead and Copper Rule

52

Sep 30Active

TTHM

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

TTHM

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Chlorine

27

Sep 30Resolved

Total Haloacetic Acids (HAA5)

27

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Public Notice

76

Sep 14Active

Groundwater Rule

45

Aug 2Resolved

Groundwater Rule

45

Aug 2Resolved

Groundwater Rule

45

Aug 2Active

Groundwater Rule

45

Aug 2Active

Groundwater Rule

45

Aug 2Active

Groundwater Rule

45

Aug 2Active

Groundwater Rule

45

Aug 2Resolved

Groundwater Rule

45

Aug 2Resolved

Groundwater Rule

45

Aug 2Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Public Notice

76

Jul 27Resolved

Public Notice

76

Jul 27Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Public Notice

75

Jul 18Resolved

Chlorine

27

Jun 30Resolved

Chlorine

27

Jun 30Resolved

Chlorine

27

Jun 30Resolved

Public Notice

76

May 4Resolved

Public Notice

76

May 4Resolved

Public Notice

76

May 4Resolved

Public Notice

75

Apr 11Resolved

Public Notice

75

Apr 11Resolved

Public Notice

75

Apr 11Resolved

Revised Total Coliform Rule

5A

Apr 3Resolved

Revised Total Coliform Rule

5A

Apr 3Resolved

Revised Total Coliform Rule

5A

Apr 3Resolved

Arsenic

02

Mar 31Resolved

Arsenic

02

Mar 31Resolved

Arsenic

02

Mar 31Resolved

Arsenic

02

Mar 31Resolved

Arsenic

02

Mar 31Resolved

Arsenic

02

Mar 31Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

Public Notice

75

Feb 4Resolved

Public Notice

75

Feb 4Resolved

Public Notice

75

Feb 4Resolved

Interim Enhanced Surface Water Treatment Rule

38

Jan 31Resolved

Interim Enhanced Surface Water Treatment Rule

38

Jan 31Resolved

Interim Enhanced Surface Water Treatment Rule

38

Jan 31Resolved

Surface Water Treatment Rule

36

Jan 31Resolved

Surface Water Treatment Rule

36

Jan 31Resolved

Surface Water Treatment Rule

36

Jan 31Resolved

How Does This Compare?

CARBONDALE (81623) has 764 recorded violations, including 130 health-based. 17 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.

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