Tapcensus

California

Butte County drinking water quality

89 active public water systems serve 227,378 people in Butte County. 45 are compliant, 44 had at least one EPA violation in the past three years, 0 are designated serious violators, and 24 carry a health flag.

Active systems 89 42 community systems
People served 227K by public water systems
Systems with violations 44 49% of active systems, past 3 years
Serious violators 0 24 systems carry a health flag

Needs attention

City of Gridley CA0410004 · Gridley · Community water system · Serves 7,269 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
City of Biggs CA0410001 · Biggs · Community water system · Serves 2,060 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Pleasant Valley Baptist Church CA0400162 · Non-Transient non-community system · Serves 600 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Sierra Moon Mutual Water Company CA0409183 · Community water system · Serves 330 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Lincoln Grove Estates CA0400020 · Community water system · Serves 327 3 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR) and Lead and Copper Rule Revisions (LCRR).
Manzanita Elementary School CA0400063 · Non-Transient non-community system · Serves 295 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Almond Grove Mobile Park CA0400040 · Community water system · Serves 253 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Lundberg Family Farm CA0400133 · Non-Transient non-community system · Serves 240 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Silver Dollar Fairgrounds CA0405003 · Non-Transient non-community system · Serves 195 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).
Foothills Manufactured Home Communuty CA0400027 · Community water system · Serves 180 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR).

14 more systems with a serious violator or health flag designation are in the lists below.

Community water systems

42 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Cal-Water Service Co.-Chico
 110,473 0 0
South Feather W&p Miners Ranch
 22,638 0 0
Thermalito Water & Sewer Dist
 12,209 0 0
Cal-Water Service Co.-Oroville
 11,047 0 0
Del Oro Water Co.-Paradise Pines
 10,738 0 0
Paradise Irrigation District
 9,114 0 0
City of Gridley
Gridley 		7,269 1 1
City of Biggs
Biggs 		2,060 1 1
Durham Irrigation District
 1,581 1 0
Del Oro Water Co.-Lime Saddle Marina
 954 0 0
Del Oro Water Co.-Stirling Bluffs
 512 0 0
Gridley Farm Labor Housing
 460 2 0
Butte Creek Estates Mutual Water CO
 399 3 0
Del Oro Water Co.-Magalia
 363 0 0
Sierra Moon Mutual Water Company
 330 2 1
Lincoln Grove Estates
 327 3 1
Lake Madrone Water District
 297 1 0
Gran Mutual Water CO
 290 1 0
Golden Feather MHP
 275 0 0
Almond Grove Mobile Park
 253 2 1
Foothills Manufactured Home Communuty
 180 1 1
Keefer Creek Estates
 160 0 0
Youth With a Mission-Springs of Living W
 150 1 1
Forest Ranch Mutual Water System
 118 1 1
Dingerville USA Park
 114 0 0
Del Oro Water Company Buzztail Dist.
 99 0 0
Merry Mountain Mutual
 90 0 0
Blue Oak Terrace Mutual
 81 2 1
Oroville Mobile Home Park
 76 2 0
Golden Oaks Mobile Home Park
 75 3 0
South Feather W&p Bangor
 73 0 0
Humboldt Woodlands Mutual
 64 1 1
Humboldt Highlands Mutual
 58 1 0
Meadowbrook Oaks
 50 4 2
Mountain Village Homeowner's Assoc
 45 2 1
Forest Knolls Mutual Water CO
 44 1 1
Hartley Mutual Water System
 41 1 1
Berry Creek Community Service Dist
 28 1 0
Forest Village LLC
 28 2 0
Falling Rock RV Park
 25 0 0
Forest Ranch Mobile Park
 24 1 0
Robinson's Corner MHP
 20 8 2
Non-community systems (47: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Butte-Glenn Community College Dist
 18,000 0 0
Gray Lodge Check Station
 8,000 0 0
Palermo Bible Family Church
 1,000 0 0
Chico Grange #486
 800 0 0
Los Parientes
 750 0 0
Pleasant Valley Baptist Church
 600 2 1
Chico Eastside Little League
 500 1 0
Dwr-Monument Hill Restrooms
 468 0 0
Sierra Nevada Brewing Co.
 400 0 0
Bidwell Park Golf Course
 325 0 0
Paradise Adventist Church
 300 1 0
Manzanita Elementary School
 295 1 1
Lundberg Family Farm
 240 1 1
Nord Country School
 230 3 1
Silver Dollar Fairgrounds
 195 1 1
Fedex Ground
 175 0 0
Liberty 1st Ward Meeting House
 151 0 0
Forest Ranch Charter School
 125 1 1
River Reflections RV & Campground
 125 1 0
Durham Dayton Industrial Partners-Pro PA
 102 0 0
Down Range Indoor Training Center
 100 0 0
Psea Camp Desabla
 100 0 0
Spring Valley School
 100 3 2
South Feather W&p Sly Creek Campground
 85 0 0
Truroots
 85 1 1
Bambi Inn
 80 0 0
G & J Properties
 80 1 0
Berry Creek School
 65 0 0
Richvale Elementary School
 63 1 1
Francis Property Management
 51 2 1
Durham Park
 50 0 0
South Feather W&p Strawberry Campround
 50 0 0
Wild Goose Duck Club
 50 1 0
Calvary Concow Church
 40 0 0
Crain Park Water System
 40 0 0
Pg&e: Philbrook Dam
 40 0 0
Sunset Moulding Chico
 38 0 0
Fedex Freight, Inc. Chi
 37 0 0
Feather River School
 34 2 2
Butte Meadows Camp
 30 0 0
Cohasset Industrial Park
 30 0 0
River One RV Park
 26 0 0
Chico Rod & Gun Club
 25 0 0
Honcut Elementary School
 25 1 0
Pg&e Table Mountain
 25 0 0
L. C. Hunting Club
 10 0 0
Biggers Glen Mutual Water CO
 6 1 1
Inactive systems (72, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.