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DELTA WATER ASSOCIATION

PWS ID: WA5318750 · Lynden, Washington 98264

DELTA WATER ASSOCIATION serves 450 people in Lynden, Washington using Groundwater water sources. It has 492 recorded EPA violations, including 153 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: DELTA WATER ASSOCIATION

DELTA WATER ASSOCIATION is a private-owned community water system that delivers drinking water to 450 residents in Lynden, Washington (Whatcom County) through 173 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 492 total violations for this system , of which 153 (31%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 334 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Nitrate, recorded in 143 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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. DELTA WATER ASSOCIATION's 492 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
450
Total Violations
492
Health-Based Violations
153
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
173
County
Whatcom
School/Daycare
No
MCL Violations
153
Monitoring Violations
334
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MCL 143 2024
Nitrate MR 20 2007
Coliform (TCR) MCL 10 1993
ETHYLENE DIBROMIDE MR 8 2008
Pentachlorophenol MR 8 2005
1,2-DIBROMO-3-CHLOROPROPANE MR 8 2008
Coliform (TCR) MR 8 1993
Endrin MR 6 2005
Methoxychlor MR 6 2005
Simazine MR 6 2005
Di(2-ethylhexyl) phthalate MR 6 2005
Hexachlorocyclopentadiene MR 6 2005
Atrazine MR 6 2005
LASSO MR 6 2005
Heptachlor MR 6 2005
Heptachlor epoxide MR 6 2005
Chlordane MR 6 2005
Picloram MR 6 2005
Dinoseb MR 6 2005
Aldicarb sulfoxide MR 6 2005
Aldicarb sulfone MR 6 2005
Aldicarb MR 6 2005
HEXACHLOROBENZENE MR 6 2005
2,4,5-TP MR 6 2005
Di(2-ethylhexyl) adipate MR 6 2005
BHC-GAMMA MR 6 2005
Toxaphene MR 6 2005
Carbofuran MR 6 2005
Benzo(a)pyrene MR 6 2005
Dalapon MR 6 2005

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 DELTA WATER ASSOCIATION.

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 WA5318750 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 DELTA WATER ASSOCIATION 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
2024 Nitrate MCL 143 SDWIS / WA5318750 / 1040
2008 ETHYLENE DIBROMIDE MR 8 SDWIS / WA5318750 / 2946
2008 1,2-DIBROMO-3-CHLOROPROPANE MR 8 SDWIS / WA5318750 / 2931
2007 Nitrate MR 20 SDWIS / WA5318750 / 1040
2005 Pentachlorophenol MR 8 SDWIS / WA5318750 / 2326
2005 Endrin MR 6 SDWIS / WA5318750 / 2005
2005 Methoxychlor MR 6 SDWIS / WA5318750 / 2015
2005 Simazine MR 6 SDWIS / WA5318750 / 2037
2005 Di(2-ethylhexyl) phthalate MR 6 SDWIS / WA5318750 / 2039
2005 Hexachlorocyclopentadiene MR 6 SDWIS / WA5318750 / 2042
2005 Atrazine MR 6 SDWIS / WA5318750 / 2050
2005 LASSO MR 6 SDWIS / WA5318750 / 2051
2005 Heptachlor MR 6 SDWIS / WA5318750 / 2065
2005 Heptachlor epoxide MR 6 SDWIS / WA5318750 / 2067
2005 Chlordane MR 6 SDWIS / WA5318750 / 2959

How DELTA WATER ASSOCIATION Compares

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

Metric DELTA WATER ASSOCIATION Washington avg Federal benchmark
Total violations 492 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 153 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 450 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 DELTA WATER ASSOCIATION water safe to drink? ▼
DELTA WATER ASSOCIATION (PWS ID: WA5318750) has 492 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 450 people using Groundwater sources.
How many people does DELTA WATER ASSOCIATION serve? ▼
DELTA WATER ASSOCIATION serves 450 people in Lynden, Washington. It is a Private-owned system using Groundwater water sources with 173 service connections.
What type of violations does DELTA WATER ASSOCIATION have? ▼
DELTA WATER ASSOCIATION has 492 total violations: 153 health-based violations (MCL exceedances or treatment failures), 334 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DELTA WATER ASSOCIATION water? ▼
No PFAS testing data is available for DELTA WATER ASSOCIATION under the EPA's UCMR5 monitoring program.
What water source does DELTA WATER ASSOCIATION use? ▼
DELTA WATER ASSOCIATION 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. This data is provided for informational purposes only.

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