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Tap water quality report

Grizzly Lake Csd-Delleker

EPA monitoring tested this supplier for 16 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

16
contaminants tested
8
detected
1,314
people served
91
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Plumas

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.

91
health-based violations
102
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2023-07-01 → 2023-09-30
MCL Health-based Archived 2023-07-01 → 2023-09-30
MCL Health-based Archived 2022-01-01 → 2022-03-31
MCL Health-based Archived 2022-01-01 → 2022-03-31
MCL Health-based Archived 2021-10-01 → 2021-12-31
MCL Health-based Archived 2021-10-01 → 2021-12-31
MCL Health-based Archived 2021-07-01 → 2021-09-30
MCL Health-based Archived 2021-07-01 → 2021-09-30
MCL Health-based Archived 2021-04-01 → 2021-06-30
MCL Health-based Archived 2021-04-01 → 2021-06-30

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 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
Combined Uranium
46.3241 µg/L 154%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
worst single sample: 63.623 µg/L
68/68 SYR4 2012–2019
Nitrate
528.84 µg/L 5.3%
of the EPA limit 10000 µg/L
 20/24 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Copper
405.5 µg/L 31%
of the EPA limit 1300 µg/L
worst single sample: 410 µg/L
4/5 SYR4 2012–2014
Lead
11.875 µg/L 79%
of the EPA limit 15 µg/L
worst single sample: 13 µg/L
4/4 SYR4 2014
Arsenic
3.95 µg/L 40%
of the EPA limit 10 µg/L
worst single sample: 4 µg/L
2/2 SYR4 2018
Barium
89.05 µg/L 4.5%
of the EPA limit 2000 µg/L
worst single sample: 93 µg/L
2/2 SYR4 2018
Antimony, Total
1 µg/L 17%
of the EPA limit 6 µg/L
 1/2 SYR4 2018
8 contaminants tested, none detected
Beryllium, TotalCadmiumChromiumFluorideMercuryNitriteSeleniumThallium, Total

Utility contact

Contact
CASTANEDA, SHARON
Phone
530-832-5225
Email
glcsddelleker@gmail.com

Frequently asked questions about Grizzly Lake Csd-Delleker

Is Grizzly Lake Csd-Delleker tap water safe to drink?

EPA monitoring detected 8 contaminants in Grizzly Lake Csd-Delleker'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 Grizzly Lake Csd-Delleker's water?

EPA monitoring detected Combined Uranium, Nitrate, Lead, Copper, Lead, and others. The full list with the level and data source for each is above.

How many people does Grizzly Lake Csd-Delleker serve?

Grizzly Lake Csd-Delleker reports serving 1,314 people in California, per its EPA record.

Has Grizzly Lake Csd-Delleker had any water quality violations?

The EPA has 102 violations on file for Grizzly Lake Csd-Delleker, of which 91 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.