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Tap water quality report

Riverside Water Dist #1

EPA monitoring tested this supplier for 12 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

12
contaminants tested
7
detected
48
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Private
Counties served
Snohomish

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
39
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Archived 2025-01-01 → 2025-12-31
MR Monitoring Archived 2025-01-01 → 2025-12-31
MON Monitoring Resolved 2024-11-01 → 2024-11-30
MR Monitoring Resolved 2023-01-01 → 2023-12-31
MR Monitoring Resolved 2023-01-01 → 2023-12-31
MR Monitoring Resolved 2021-01-01
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2020-01-01
MON Monitoring Resolved 2019-10-01 → 2019-10-31

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
Lead
0.00070 mg/L 4.7%
of the EPA limit 0.0150 mg/L
 5/5 LCR 2024
Bromodichloromethane
1.29 µg/L
No EPA limit set
worst single sample: 1.3 µg/L
3/3 SYR4 2013–2017
Chloroform
23.07 µg/L
No EPA limit set
worst single sample: 23.1 µg/L
3/3 SYR4 2013–2017
Dichloroacetic Acid
13.01 µg/L
No EPA limit set
worst single sample: 13.1 µg/L
3/3 SYR4 2013–2017
TTHM
24.35 µg/L 30%
of the EPA limit 80 µg/L
worst single sample: 24.4 µg/L
3/3 SYR4 2013–2017
Total Haloacetic Acids (HAA5)
31.58 µg/L 53%
of the EPA limit 60 µg/L
worst single sample: 31.9 µg/L
3/3 SYR4 2013–2017
Trichloroacetic Acid
18.57 µg/L
No EPA limit set
worst single sample: 18.8 µg/L
3/3 SYR4 2013–2017
5 contaminants tested, none detected
BromoformDibromoacetic AcidDibromochloromethaneMonobromoacetic AcidMonochloroacetic Acid

Utility contact

Contact
Steven Arbaugh

Frequently asked questions about Riverside Water Dist #1

Is Riverside Water Dist #1 tap water safe to drink?

EPA monitoring detected 7 contaminants in Riverside Water Dist #1'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 Riverside Water Dist #1's water?

EPA monitoring detected Lead, Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Riverside Water Dist #1 serve?

Riverside Water Dist #1 reports serving 48 people in Washington, per its EPA record.

Has Riverside Water Dist #1 had any water quality violations?

The EPA has 39 violations on file for Riverside Water Dist #1, 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.