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Tap water quality report

Arcata, City of

EPA monitoring tested this supplier for 78 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

78
contaminants tested
10
detected
20,875
people served
2
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
GWP
Ownership
Local government
Counties served
Humboldt

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.

2
health-based violations
2
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1993-06-01 → 1993-06-30
TT Health-based Resolved 1993-06-01 → 1993-06-30

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 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
0.0036 mg/L 24%
of the EPA limit 0.0150 mg/L
 24/24 LCR 2025
Bromodichloromethane
6.2 µg/L
No EPA limit set
 22/22 SYR4 2013–2019
Chloroform
13 µg/L
No EPA limit set
 22/22 SYR4 2013–2019
TTHM
20 µg/L 25%
of the EPA limit 80 µg/L
 22/22 SYR4 2013–2019
Dichloroacetic Acid
5.2 µg/L
No EPA limit set
 19/22 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
22 µg/L 37%
of the EPA limit 60 µg/L
 19/22 SYR4 2013–2019
Trichloroacetic Acid
6.4 µg/L
No EPA limit set
 17/22 SYR4 2013–2019
Dibromochloromethane
2.9 µg/L
No EPA limit set
 15/22 SYR4 2013–2019
Monochloroacetic Acid
10 µg/L
No EPA limit set
 2/22 SYR4 2013–2019
Barium
130 µg/L 6.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2014
68 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicBenzeneBeryllium, TotalBromoformChlorobenzeneCopperCadmiumCarbon TetrachlorideChromiumDichloromethaneDibromoacetic AcidEthylbenzeneFluorideHfpo-DaLeadMercuryMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitrateNitrate-NitriteNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SINKHORN, EMILY
Phone
707-822-8184
Email
esinkhorn@cityofarcata.org

Frequently asked questions about Arcata, City of

Is Arcata, City of tap water safe to drink?

EPA monitoring detected 10 contaminants in Arcata, City of'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 Arcata, City of's water?

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

How many people does Arcata, City of serve?

Arcata, City of reports serving 20,875 people in California, per its EPA record.

Has Arcata, City of had any water quality violations?

The EPA has 2 violations on file for Arcata, City of, of which 2 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.