Water Quality in HOUSTON, TX (77027)

EPA violation data for public water systems serving ZIP code 77027.

481

Total Violations

51

Health-Based

430

Monitoring / Reporting

475

Resolved

What does this mean?

475 of 481 violations have been resolved. 51 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 430 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: 228 Population served: 826,857

Violations Detail (481 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Lead and Copper RuleMonitoringN/AN/ASep 28, 2025ActiveN/A
NitrateHealth-BasedN/A12Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A12Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
NitrateHealth-BasedN/A12Jun 30, 2025ResolvedInfants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AMay 29, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AMay 29, 2025ResolvedN/A
Interim Enhanced Surface Water Treatment RuleMonitoringN/AN/AApr 30, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(17)

Lead and Copper Rule

66

Sep 28Active

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Nitrate

01

Jun 30Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Public Notice

75

May 29Resolved

Public Notice

75

May 29Resolved

Interim Enhanced Surface Water Treatment Rule

38

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

38

Apr 30Resolved

Public Notice

75

Feb 28Active

Public Notice

75

Feb 2Active

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

2024(128)

Lead and Copper Rule

66

Dec 29Resolved

Lead and Copper Rule

66

Dec 29Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Public Notice

75

Oct 31Resolved

Public Notice

75

Oct 31Resolved

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

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

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

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

2E

Oct 16Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Di(2-ethylhexyl) phthalate

02

Sep 30Resolved

Di(2-ethylhexyl) phthalate

02

Sep 30Resolved

Di(2-ethylhexyl) phthalate

02

Sep 30Resolved

Di(2-ethylhexyl) phthalate

02

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

Lead and Copper Rule

52

Sep 30Resolved

E. COLI

34

Aug 14Resolved

E. COLI

34

Aug 14Resolved

E. COLI

34

Aug 14Resolved

TTHM

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

TTHM

27

Jun 30Resolved

Public Notice

75

Jun 14Resolved

Public Notice

75

Jun 14Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

TTHM

02

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Atrazine

03

Mar 31Resolved

Heptachlor

03

Mar 31Resolved

Atrazine

03

Mar 31Resolved

Atrazine

03

Mar 31Resolved

Benzo(a)pyrene

03

Mar 31Resolved

Benzo(a)pyrene

03

Mar 31Resolved

Benzo(a)pyrene

03

Mar 31Resolved

Benzo(a)pyrene

03

Mar 31Resolved

LASSO

03

Mar 31Resolved

LASSO

03

Mar 31Resolved

LASSO

03

Mar 31Resolved

LASSO

03

Mar 31Resolved

HEXACHLOROBENZENE

03

Mar 31Resolved

HEXACHLOROBENZENE

03

Mar 31Resolved

HEXACHLOROBENZENE

03

Mar 31Resolved

HEXACHLOROBENZENE

03

Mar 31Resolved

Atrazine

03

Mar 31Resolved

Chlordane

03

Mar 31Resolved

Chlordane

03

Mar 31Resolved

Chlordane

03

Mar 31Resolved

Heptachlor epoxide

03

Mar 31Resolved

Heptachlor epoxide

03

Mar 31Resolved

Heptachlor epoxide

03

Mar 31Resolved

Heptachlor epoxide

03

Mar 31Resolved

Chlordane

03

Mar 31Resolved

Pentachlorophenol

03

Mar 31Resolved

Pentachlorophenol

03

Mar 31Resolved

Pentachlorophenol

03

Mar 31Resolved

Endrin

03

Mar 31Resolved

Endrin

03

Mar 31Resolved

Endrin

03

Mar 31Resolved

Endrin

03

Mar 31Resolved

BHC-GAMMA

03

Mar 31Resolved

BHC-GAMMA

03

Mar 31Resolved

BHC-GAMMA

03

Mar 31Resolved

BHC-GAMMA

03

Mar 31Resolved

Methoxychlor

03

Mar 31Resolved

Methoxychlor

03

Mar 31Resolved

Methoxychlor

03

Mar 31Resolved

Methoxychlor

03

Mar 31Resolved

Toxaphene

03

Mar 31Resolved

Toxaphene

03

Mar 31Resolved

Toxaphene

03

Mar 31Resolved

Toxaphene

03

Mar 31Resolved

Di(2-ethylhexyl) adipate

03

Mar 31Resolved

Di(2-ethylhexyl) adipate

03

Mar 31Resolved

Di(2-ethylhexyl) adipate

03

Mar 31Resolved

Di(2-ethylhexyl) adipate

03

Mar 31Resolved

Simazine

03

Mar 31Resolved

Simazine

03

Mar 31Resolved

Simazine

03

Mar 31Resolved

Simazine

03

Mar 31Resolved

Di(2-ethylhexyl) phthalate

03

Mar 31Resolved

Di(2-ethylhexyl) phthalate

03

Mar 31Resolved

Di(2-ethylhexyl) phthalate

03

Mar 31Resolved

Di(2-ethylhexyl) phthalate

03

Mar 31Resolved

Hexachlorocyclopentadiene

03

Mar 31Resolved

Hexachlorocyclopentadiene

03

Mar 31Resolved

Pentachlorophenol

03

Mar 31Resolved

Hexachlorocyclopentadiene

03

Mar 31Resolved

Heptachlor

03

Mar 31Resolved

Heptachlor

03

Mar 31Resolved

Heptachlor

03

Mar 31Resolved

Hexachlorocyclopentadiene

03

Mar 31Resolved

How Does This Compare?

HOUSTON (77027) has 481 recorded violations, including 51 health-based. 6 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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