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Tap water quality report

Mckinleyville C.S.D.

EPA monitoring tested this supplier for 42 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

42
contaminants tested
9
detected
16,900
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
5
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
MR Monitoring Resolved 2022-10-01
MR Monitoring Resolved 2022-10-01
Other Monitoring Archived 1984-03-01 → 1984-03-31

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 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
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
 29/29 LCR 2026
Bromodichloromethane
7.1 µg/L
No EPA limit set
 5/5 SYR4 2013–2019
Chloroform
31 µg/L
No EPA limit set
 5/5 SYR4 2013–2019
Dichloroacetic Acid
9.3 µg/L
No EPA limit set
 5/5 SYR4 2013–2019
TTHM
40 µg/L 50%
of the EPA limit 80 µg/L
 5/5 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
23 µg/L 38%
of the EPA limit 60 µg/L
 5/5 SYR4 2013–2019
Trichloroacetic Acid
11 µg/L
No EPA limit set
 5/5 SYR4 2013–2019
Dibromochloromethane
1.6 µg/L
No EPA limit set
 3/5 SYR4 2013–2019
Monochloroacetic Acid
2.5 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
33 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformDibromoacetic AcidHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
KASPARI, PATRICK
Phone
707-839-3251
Email
pkaspari@MCKINLEYVILLECSD.COM

Frequently asked questions about Mckinleyville C.S.D.

Is Mckinleyville C.S.D. tap water safe to drink?

EPA monitoring detected 9 contaminants in Mckinleyville C.S.D.'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 Mckinleyville C.S.D.'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 Mckinleyville C.S.D. serve?

Mckinleyville C.S.D. reports serving 16,900 people in California, per its EPA record.

Has Mckinleyville C.S.D. had any water quality violations?

The EPA has 5 violations on file for Mckinleyville C.S.D., 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.