Tap WaterIndex

← Washington

Tap water quality report

Willeys Lake Terrace Water Assn

EPA monitoring tested this supplier for 73 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
9
detected
180
people served
4
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Private
Counties served
Whatcom

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

4
health-based violations
33
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2025-01-01 → 2025-12-31
MCL Health-based Resolved 2024-01-01 → 2024-12-31
MCL Health-based Resolved 2024-01-01 → 2024-12-31
MCL Health-based Archived 1992-09-01 → 1992-09-30
MON Monitoring Resolved 2021-05-01 → 2021-05-31
MR Monitoring Resolved 2011-04-01 → 2011-06-30
MR Monitoring Resolved 2006-07-01 → 2006-09-30
MR Monitoring Resolved 2006-07-01 → 2006-09-30
MR Monitoring Resolved 2006-07-01 → 2006-09-30
MR Monitoring Resolved 2006-07-01 → 2006-09-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
7316 µg/L 73%
of the EPA limit 10000 µg/L
worst single sample: 7400 µg/L
24/24 SYR4 2012–2019
Lead
0.0068 mg/L 45%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Total Haloacetic Acids (HAA5)
1.09 µg/L 1.8%
of the EPA limit 60 µg/L
worst single sample: 1.1 µg/L
3/3 SYR4 2012–2017
Bromoform
1.865 µg/L
No EPA limit set
worst single sample: 1.9 µg/L
2/4 SYR4 2012–2017
Dibromoacetic Acid
1 µg/L
No EPA limit set
 2/3 SYR4 2012–2017
Dibromochloromethane
0.9900 µg/L
No EPA limit set
worst single sample: 1 µg/L
2/4 SYR4 2012–2017
TTHM
2.855 µg/L 3.6%
of the EPA limit 80 µg/L
worst single sample: 2.9 µg/L
2/2 SYR4 2012–2017
Nitrate-Nitrite
3500 µg/L 35%
of the EPA limit 10000 µg/L
 1/1 SYR4 2013
Trichloroacetic Acid
1.1 µg/L
No EPA limit set
 1/3 SYR4 2012–2017
64 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Wade Vander Meulen

Frequently asked questions about Willeys Lake Terrace Water Assn

Is Willeys Lake Terrace Water Assn tap water safe to drink?

EPA monitoring detected 9 contaminants in Willeys Lake Terrace Water Assn's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Willeys Lake Terrace Water Assn's water?

EPA monitoring detected Nitrate, Lead, Total Haloacetic Acids (HAA5), Bromoform, Dibromoacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Willeys Lake Terrace Water Assn serve?

Willeys Lake Terrace Water Assn reports serving 180 people in Washington, per its EPA record.

Has Willeys Lake Terrace Water Assn had any water quality violations?

The EPA has 33 violations on file for Willeys Lake Terrace Water Assn, of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.