Water Quality: Chico, CA

30 water systems • 23,374 people served

Multiple Health Violations
639
Total Violations
378
Health-Based Violations
30
Water Systems
23,374
Population Served

Water Quality Summary

Chico has 378 health-based violations on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: Contaminant 1022, E. coli, Fecal Coliform, Gross Alpha, Haloacetic Acids, Nitrate-Nitrite, Selenium, Stage 2 DBP, Total Haloacetic Acids (HAA5). In total, 639 violations are on record for 30 water systems serving 23,374 people.

Contaminants Found

Contaminant 1022
E. coli
Fecal Coliform
Gross Alpha
Haloacetic Acids
Nitrate-Nitrite
Selenium
Stage 2 DBP
Total Haloacetic Acids (HAA5)

Water Systems Serving Chico

System Name PWSID Source Population Violations
DEL ORO WATER CO.-PARADISE PINES CA0410011 Surface Water 10,940 0
DEL ORO WATER CO-FERNDALE CA1210007 Groundwater 1,662 0
DEL ORO WATER COMPANY - STRAWBERRY DIV. CA5510007 Surface Water 1,295 14
DEL ORO RIVER ISLAND SERV TERR #1 CA5400665 Surface Water 1,280 212
DEL ORO CALIFORNIA PINES DISTRICT CA5410034 Groundwater 944 52
DEL ORO WATER CO.-JOHNSON PARK CA4510015 Groundwater 904 0
DEL ORO WATER CO.-LIME SADDLE MARINA CA0405001 Surface Water 895 0
DEL ORO TRAVER DISTRICT CA5400553 Groundwater 657 10
DEL ORO WATER CO.-STIRLING BLUFFS CA0410018 Surface Water 521 18
GRIDLEY FARM LABOR HOUSING CA0400012 Groundwater 460 7
BUTTE CREEK ESTATES MUTUAL WATER CO CA0400007 Groundwater 399 15
BENBOW-DEL ORO W.C. CA1200671 Surface Water 370 4
DEL ORO WATER CO.-MAGALIA CA0410009 Groundwater 340 13
DEL ORO GRANDVIEW GARDENS DISTRICT CA5400666 Groundwater 323 62
DEL ORO WC - COUNTRY ESTATES DIST CA1500314 Groundwater 297 11
GRAN MUTUAL WATER CO CA0400008 Groundwater 290 1
DEL ORO WC - BLACK BUTTE DISTRICT CA1100404 Groundwater 277 0
ALMOND GROVE MOBILE PARK CA0400040 Groundwater 253 7
DEL ORO WC - ARBUCKLE DISTRICT CA0605011 Groundwater 185 1
DEL ORO WATER CO. - HAT CREEK DISTRICT CA4500022 Surface Water 185 12
KEEFER CREEK ESTATES CA0400151 Groundwater 160 1
SIERRA MOON MUTUAL WATER COMPANY CA0409183 Groundwater 120 91
DEL ORO WC - LARKSPUR MEADOWS CA5200574 Groundwater 116 5
DEL ORO WATER COMPANY - BUZZTAIL DIST. CA0400091 Groundwater 106 13
DEL ORO WATER CO - METROPOLITAN DISTRICT CA1000057 Groundwater 92 18
DEL ORO RIVER ISLAND SERV TERR #2 CA5402048 Groundwater 89 47
BLUE OAK TERRACE MUTUAL CA0409181 Groundwater 81 4
FOREST KNOLLS MUTUAL WATER CO CA0400078 Groundwater 46 8
DEL ORO EAST PLANO DISTRICT CA5400767 Groundwater 46 9
HARTLEY MUTUAL WATER SYSTEM CA0400003 Groundwater 41 4

Concerned About Your Water?

A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.

Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.

Data Sources

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.

Verify at epa.gov • Search ECHO for CA