BLAINE CITY OF

Q: Is BLAINE CITY OF water safe to drink?

BLAINE CITY OF (PWS ID: WA5307300) has 141 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 6,319 people using Groundwater sources.

Q: How many people does BLAINE CITY OF serve?

BLAINE CITY OF serves 6,319 people in BLAINE, Washington. It is a Local-owned system using Groundwater water sources with 2,634 service connections.

Q: What type of violations does BLAINE CITY OF have?

BLAINE CITY OF has 141 total violations: 18 health-based violations (MCL exceedances or treatment failures), 122 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in BLAINE CITY OF water?

No. BLAINE CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does BLAINE CITY OF use?

BLAINE CITY OF uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Q: Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 4, 2026

PWS ID: WA5307300 · BLAINE, Washington 98230

BLAINE CITY OF serves 6,319 people in BLAINE, Washington using Groundwater water sources. It has 141 recorded EPA violations, including 18 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: BLAINE CITY OF

BLAINE CITY OF is a local-owned community water system that delivers drinking water to 6,319 residents in BLAINE, Washington (Whatcom County) through 2,634 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 141 total violations for this system , of which 18 (13%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 122 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Nitrate, recorded in 22 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. BLAINE CITY OF's 141 violations sit above the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served

6,319

Total Violations

141

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 2,634
County: Whatcom
School/Daycare: No
MCL Violations: 18
Monitoring Violations: 122
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Nitrate	MR	22	2018
Coliform (TCR)	MCL	18	1996
Diquat	MR	13	2008
Lead and Copper Rule	MR	10	2007
Coliform (TCR)	MR	7	2010
Pentachlorophenol	MR	5	2008
Dalapon	MR	3	2008
Picloram	MR	3	2008
Dinoseb	MR	3	2008
2,4,5-TP	MR	3	2008
Aldicarb sulfone	MR	2	2006
Arsenic	MR	2	2025
ETHYLENE DIBROMIDE	MR	2	2006
HEXACHLOROBENZENE	MR	2	2006
Hexachlorocyclopentadiene	MR	2	2006
Simazine	MR	2	2006
1,2-DIBROMO-3-CHLOROPROPANE	MR	2	2006
Heptachlor epoxide	MR	2	2006
Atrazine	MR	2	2006
Aldicarb sulfoxide	MR	2	2006
Aldicarb	MR	2	2006
Methoxychlor	MR	2	2006
BHC-GAMMA	MR	2	2006
LASSO	MR	2	2006
Chlordane	MR	2	2006
OXAMYL	MR	2	2006
Heptachlor	MR	2	2006
Carbofuran	MR	2	2006
Benzo(a)pyrene	MR	2	2006
Endrin	MR	2	2006

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 180 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFHxS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	8/26/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFHxA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	8/26/2024	<0.007 µg/L	0.007 µg/L	Not Detected
NEtFOSAA	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	8/26/2024	<0.006 µg/L	0.006 µg/L	Not Detected
PFOA	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
11Cl-PF3OUdS	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFNA	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFDoA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	8/26/2024	<9 µg/L	9 µg/L	Not Detected
PFHpA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFOS	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFMPA	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFTA	8/26/2024	<0.008 µg/L	0.008 µg/L	Not Detected
9Cl-PF3ONS	8/26/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFEESA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	8/26/2024	<0.02 µg/L	0.02 µg/L	Not Detected
8:2 FTS	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
HFPO-DA	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	8/26/2024	<0.02 µg/L	0.02 µg/L	Not Detected
PFNA	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFOA	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFDA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	8/26/2024	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFUnA	8/26/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFHxA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	8/26/2024	<0.008 µg/L	0.008 µg/L	Not Detected
PFBA	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
6:2 FTS	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	8/26/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFMPA	8/26/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeA	8/26/2024	<0.003 µg/L	0.003 µg/L	Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for BLAINE CITY OF.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WA5307300 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects BLAINE CITY OF under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health — Office of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest)	Contaminant	Category	Count	EPA Record
2025	Arsenic	MR	2	SDWIS / WA5307300 / 1005
2018	Nitrate	MR	22	SDWIS / WA5307300 / 1040
2010	Coliform (TCR)	MR	7	SDWIS / WA5307300 / 3100
2008	Diquat	MR	13	SDWIS / WA5307300 / 2032
2008	Pentachlorophenol	MR	5	SDWIS / WA5307300 / 2326
2008	Dalapon	MR	3	SDWIS / WA5307300 / 2031
2008	Picloram	MR	3	SDWIS / WA5307300 / 2040
2008	Dinoseb	MR	3	SDWIS / WA5307300 / 2041
2008	2,4,5-TP	MR	3	SDWIS / WA5307300 / 2110
2007	Lead and Copper Rule	MR	10	SDWIS / WA5307300 / 5000
2006	Aldicarb sulfone	MR	2	SDWIS / WA5307300 / 2044
2006	ETHYLENE DIBROMIDE	MR	2	SDWIS / WA5307300 / 2946
2006	HEXACHLOROBENZENE	MR	2	SDWIS / WA5307300 / 2274
2006	Hexachlorocyclopentadiene	MR	2	SDWIS / WA5307300 / 2042
2006	Simazine	MR	2	SDWIS / WA5307300 / 2037

How BLAINE CITY OF Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric	BLAINE CITY OF	Washington avg	Federal benchmark
Total violations	141	69	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	18	4.5	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	39.7%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	6,319	2,137	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

Federal MCL reference — Safe Drinking Water Act thresholds ▼

Contaminant	Federal MCL / Action Level	Note
Lead	0 mg/L (Action Level: 0.015 mg/L)	Lead and Copper Rule treatment technique
Arsenic	0.010 mg/L (10 ppb)	Health-based MCL since 2006
Total Coliform	Treatment technique (RTCR)	Indicator organism, monitoring trigger
PFOA / PFOS (PFAS)	4.0 ppt each (final 2024 rule)	Compliance deadline 2029
Nitrate (as N)	10 mg/L	Acute health risk for infants

Frequently Asked Questions

Is BLAINE CITY OF water safe to drink? ▼

BLAINE CITY OF (PWS ID: WA5307300) has 141 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 6,319 people using Groundwater sources.

How many people does BLAINE CITY OF serve? ▼

BLAINE CITY OF serves 6,319 people in BLAINE, Washington. It is a Local-owned system using Groundwater water sources with 2,634 service connections.

What type of violations does BLAINE CITY OF have? ▼

BLAINE CITY OF has 141 total violations: 18 health-based violations (MCL exceedances or treatment failures), 122 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in BLAINE CITY OF water? ▼

No. BLAINE CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does BLAINE CITY OF use? ▼

BLAINE CITY OF uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from? ▼

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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