Tap WaterIndex

← California

Tap water quality report

Big Basin Water Company

EPA monitoring tested this supplier for 60 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

60
contaminants tested
19
detected
1,120
people served
52
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Santa Cruz

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.

52
health-based violations
99
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2005-02-01 → 2005-02-28
TT Health-based Resolved 2005-02-01 → 2005-02-28
TT Health-based Resolved 2005-01-01 → 2005-01-31
TT Health-based Resolved 2005-01-01 → 2005-01-31
TT Health-based Resolved 2004-06-01 → 2004-06-30
TT Health-based Resolved 2004-06-01 → 2004-06-30
TT Health-based Resolved 2004-05-01 → 2004-05-31
TT Health-based Resolved 2004-05-01 → 2004-05-31
TT Health-based Resolved 2004-04-01 → 2004-04-30
TT Health-based Resolved 2004-04-01 → 2004-04-30

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
Bromodichloromethane
11.8 µg/L
No EPA limit set
worst single sample: 12 µg/L
25/25 SYR4 2013–2019
Chloroform
46.2 µg/L
No EPA limit set
worst single sample: 50 µg/L
25/25 SYR4 2013–2019
TTHM
59.6 µg/L 75%
of the EPA limit 80 µg/L
worst single sample: 63 µg/L
25/25 SYR4 2013–2019
Dibromochloromethane
5.01 µg/L
No EPA limit set
worst single sample: 7.2 µg/L
24/25 SYR4 2013–2019
Dichloroacetic Acid
20.95 µg/L
No EPA limit set
worst single sample: 21 µg/L
22/25 SYR4 2013–2019
Lead
0.0120 mg/L 80%
of the EPA limit 0.0150 mg/L
 22/22 LCR 2025
Total Haloacetic Acids (HAA5)
44 µg/L 73%
of the EPA limit 60 µg/L
worst single sample: 45 µg/L
22/25 SYR4 2013–2019
Trichloroacetic Acid
22.95 µg/L
No EPA limit set
worst single sample: 24 µg/L
22/25 SYR4 2013–2019
Barium
43 µg/L 2.2%
of the EPA limit 2000 µg/L
 20/27 SYR4 2012–2019
Fluoride
188 µg/L 4.7%
of the EPA limit 4000 µg/L
worst single sample: 210 µg/L
12/27 SYR4 2012–2019
Lead
1.23 µg/L 8.2%
of the EPA limit 15 µg/L
worst single sample: 1.5 µg/L
7/27 SYR4 2012–2019
Arsenic
1.5 µg/L 15%
of the EPA limit 10 µg/L
worst single sample: 1.6 µg/L
6/27 SYR4 2012–2019
Bromoform
3 µg/L
No EPA limit set
worst single sample: 3.5 µg/L
6/25 SYR4 2013–2019
Chromium
0.8625 µg/L 0.9%
of the EPA limit 100 µg/L
worst single sample: 0.8700 µg/L
4/27 SYR4 2012–2019
Nitrate
130 µg/L 1.3%
of the EPA limit 10000 µg/L
 2/66 SYR4 2012–2019
Nitrate-Nitrite
150000 µg/L 1500%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
 2/24 SYR4 2012–2019
Cadmium
0.2200 µg/L 4.4%
of the EPA limit 5 µg/L
 1/27 SYR4 2012–2019
Dibromoacetic Acid
1.1 µg/L
No EPA limit set
 1/25 SYR4 2013–2019
Monochloroacetic Acid
2.1 µg/L
No EPA limit set
 1/25 SYR4 2013–2019
41 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCarbon TetrachlorideDichloromethaneDalaponDinosebDiquatEthylbenzeneLassoMercuryMonobromoacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FARJEAT, RENE
Phone
949-281-6542
Email
[email protected]

Frequently asked questions about Big Basin Water Company

Is Big Basin Water Company tap water safe to drink?

EPA monitoring detected 19 contaminants in Big Basin Water Company'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 Big Basin Water Company's water?

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

How many people does Big Basin Water Company serve?

Big Basin Water Company reports serving 1,120 people in California, per its EPA record.

Has Big Basin Water Company had any water quality violations?

The EPA has 99 violations on file for Big Basin Water Company, of which 52 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.