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Tap water quality report

Ravensdale Water Supply

EPA monitoring tested this supplier for 12 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

12
contaminants tested
10
detected
389
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Private
Counties served
King

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.

0
health-based violations
51
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2025-07-01
MON Monitoring Resolved 2022-07-01 → 2022-07-31
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2023
Dichloroacetic Acid
9.35 µg/L
No EPA limit set
 8/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
33.26 µg/L 55%
of the EPA limit 60 µg/L
 8/8 SYR4 2012–2019
Trichloroacetic Acid
30 µg/L
No EPA limit set
 8/8 SYR4 2012–2019
Bromodichloromethane
2.75 µg/L
No EPA limit set
 7/7 SYR4 2013–2019
Chloroform
22.9 µg/L
No EPA limit set
 7/7 SYR4 2013–2019
TTHM
25.45 µg/L 32%
of the EPA limit 80 µg/L
 7/7 SYR4 2013–2019
Dibromochloromethane
0.9700 µg/L
No EPA limit set
 4/7 SYR4 2013–2019
Bromoform
0.5500 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Dibromoacetic Acid
1.03 µg/L
No EPA limit set
 1/8 SYR4 2012–2019
2 contaminants tested, none detected
Monobromoacetic AcidMonochloroacetic Acid

Utility contact

Contact
Chase OBrien

Frequently asked questions about Ravensdale Water Supply

Is Ravensdale Water Supply tap water safe to drink?

EPA monitoring detected 10 contaminants in Ravensdale Water Supply'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 Ravensdale Water Supply's water?

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

How many people does Ravensdale Water Supply serve?

Ravensdale Water Supply reports serving 389 people in Washington, per its EPA record.

Has Ravensdale Water Supply had any water quality violations?

The EPA has 51 violations on file for Ravensdale Water Supply, of which 0 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.