Water Quality in SEATTLE, WA (98126)

EPA violation data for public water systems serving ZIP code 98126.

Total Violations

Health-Based

Monitoring / Reporting

Resolved

What does this mean?

72 of 88 violations have been resolved. 36 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 52 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: 2 Population served: 100

Violations Detail (88 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Nitrate	Health-Based	N/A	16	Aug 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Public Notice	Monitoring	N/A	N/A	Aug 22, 2025	Active	N/A
Nitrate	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Public Notice	Monitoring	N/A	N/A	Jul 24, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 24, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Nitrate	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Nitrate	Health-Based	N/A	17	May 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	May 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	May 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Public Notice	Monitoring	N/A	N/A	Apr 3, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Apr 3, 2025	Active	N/A
Arsenic	Health-Based	N/A	0.0245	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Health-Based	N/A	0.0245	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Arsenic	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Nitrate	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	20	Feb 28, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	20	Feb 28, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	Jan 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	Jan 31, 2025	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	Dec 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Public Notice	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Nitrate	Health-Based	N/A	17	Dec 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	Dec 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Arsenic	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Public Notice	Monitoring	N/A	N/A	Dec 7, 2024	Active	N/A
E. COLI	Monitoring	0	N/A	Dec 2, 2024	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Nitrate	Health-Based	N/A	15	Nov 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	15	Nov 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Public Notice	Monitoring	N/A	N/A	Nov 7, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Nov 7, 2024	Resolved	N/A
Nitrate	Health-Based	N/A	17	Oct 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	17	Oct 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Arsenic	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Skin damage; circulatory system problems; increased risk of cancer
Nitrate	Health-Based	N/A	18	Sep 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	18	Sep 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Nitrate	Health-Based	N/A	16	Aug 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	16	Aug 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	16	Aug 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2024	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	May 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	14	Jan 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	14	Jan 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	14	Jan 31, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Active	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Active	N/A
Public Notice	Monitoring	N/A	N/A	Sep 1, 2023	Resolved	N/A
Nitrate	Health-Based	N/A	13.6	Jul 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	13.6	Jul 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Active	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Active	N/A
Nitrate	Health-Based	N/A	14.9	Mar 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	14.9	Mar 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	14.9	Mar 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Aug 25, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Nitrate	Health-Based	N/A	16.4	Jun 30, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	16.4	Jun 30, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Health-Based	N/A	16.4	Jun 30, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath

Lead & Copper Levels

Violation Timeline

2025(23)

Nitrate

Aug 31Resolved

Public Notice

Aug 22Active

Nitrate

Jul 31Resolved

Public Notice

Jul 24Resolved

Public Notice

Jul 24Resolved

Revised Total Coliform Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Active

Nitrate

Jun 30Resolved

Consumer Confidence Rule

Jun 30Active

Nitrate

May 31Resolved

Nitrate

May 31Resolved

Nitrate

May 31Resolved

Nitrate

Apr 30Resolved

Public Notice

Apr 3Active

Public Notice

Apr 3Active

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Arsenic

Mar 31Resolved

Nitrate

Mar 31Resolved

Nitrate

Feb 28Resolved

Nitrate

Feb 28Resolved

Nitrate

Jan 31Resolved

Nitrate

Jan 31Resolved

2024(34)

Nitrate

Dec 31Resolved

Public Notice

Dec 31Active

Nitrate

Dec 31Resolved

Nitrate

Dec 31Resolved

Arsenic

Dec 31Resolved

Public Notice

Dec 7Active

E. COLI

Dec 2Active

Nitrate

Nov 30Resolved

Nitrate

Nov 30Resolved

Public Notice

Nov 7Resolved

Public Notice

Nov 7Resolved

Nitrate

Oct 31Resolved

Nitrate

Oct 31Resolved

Arsenic

Sep 30Resolved

Nitrate

Sep 30Resolved

Nitrate

Sep 30Resolved

Consumer Confidence Rule

Sep 30Active

Consumer Confidence Rule

Sep 30Active

Nitrate

Aug 31Resolved

Nitrate

Aug 31Resolved

Nitrate

Aug 31Resolved

Nitrate

Jul 31Resolved

Nitrate

Jun 30Resolved

Consumer Confidence Rule

Jun 30Active

Consumer Confidence Rule

Jun 30Active

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Nitrate

May 31Resolved

Nitrate

Apr 30Resolved

Nitrate

Mar 31Resolved

Nitrate

Jan 31Resolved

Nitrate

Jan 31Resolved

Nitrate

Jan 31Resolved

How Does This Compare?

SEATTLE (98126) has 88 recorded violations, including 36 health-based. 16 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 →

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

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.

Water Quality in SEATTLE, WA (98126)

What does this mean?

Violations Detail (88 total)

Lead & Copper Levels

Violation Timeline

2025(23)

2024(34)

2023(12)

2022(8)

2021(11)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code