Tapcensus

California

Humboldt County drinking water quality

90 active public water systems serve 131,927 people in Humboldt County. 50 are compliant, 40 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 18 carry a health flag.

Active systems 90 44 community systems
People served 132K by public water systems
Systems with violations 40 44% of active systems, past 3 years
Serious violators 1 18 systems carry a health flag

Needs attention

Cal Fire-High Rock Conservation Camp CA1210801 · Non-Transient non-community system · Serves 80 3 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.
Willow Creek C.s.d. CA1210015 · Community water system · Serves 1,720 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Hydesville Co. W.d. CA1210019 · Community water system · Serves 1,389 3 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Scotia Csd CA1210010 · Community water system · Serves 681 4 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Orleans C.s.d. CA1200729 · Community water system · Serves 636 4 rules violated in the past three years. Unresolved: Long Term 2 Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule, and Lead and Copper Rule Revisions.
Myers Flat M.w.s. Inc. CA1200538 · Community water system · Serves 330 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Palmer Creek Csd CA1206004 · Community water system · Serves 320 4 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.
Larrupin Cafe CA1200831 · Transient non-community system · Serves 247 1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
Cuddeback Grammar School CA1200681 · Non-Transient non-community system · Serves 165 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Phillipsville C.s.d. CA1200541 · Community water system · Serves 124 2 rules violated in the past three years. Unresolved: Lead and Copper Rule and Lead and Copper Rule Revisions.

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

Community water systems

44 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Eureka, City of
Eureka 		27,078 0 0
Humboldt C.s.d.
 19,775 2 1
Arcata, City of
Arcata 		18,857 1 1
McKinleyville C.s.d.
 16,900 0 0
Fortuna, City of
Fortuna 		12,133 0 0
Rio Dell, City of
Rio Dell 		3,300 0 0
Garberville Sanitary District
 2,041 1 1
Fieldbrook Glendale C.s.d.
 1,845 1 1
Willow Creek C.s.d.
 1,720 1 1
Del Oro Water Co-Ferndale
 1,662 0 0
Hydesville Co. W.d.
 1,389 3 1
Redway C.s.d.
 1,207 2 0
Blue Lake, City of
Blue Lake 		1,172 1 0
Trinidad, City of
Trinidad 		1,072 2 1
Jacoby Creek Cwd
 924 0 0
Loleta C.s.d.
 828 0 0
Resort Improvement District #1
 803 0 0
Manila Community Services Dist.
 798 0 0
Scotia Csd
 681 4 1
Humboldt Bay Mwd
 680 0 0
Orleans C.s.d.
 636 4 3
Miranda C.s.d.
 492 0 0
Westhaven C.s.d.
 490 1 0
Weott C.s.d.
 448 2 1
Del Oro Water Co-Benbow
 347 0 0
Riverside Csd
 333 0 0
Myers Flat M.w.s. Inc.
 330 2 1
Orick C.s.d.
 328 0 0
Palmer Creek Csd
 320 4 2
Green Diamond Resource Company Korbel
 250 0 0
Alderpoint County Water
 190 1 1
Trinidad Extended Stay RV
 130 1 0
Phillipsville C.s.d.
 124 2 2
Redcrest Water Works
 116 0 0
Big Lagoon Csd
 112 0 0
Mill Creek M.w.c.
 85 2 1
Orleans Mutual Water Company
 85 2 2
Briceland C.s.d.
 75 0 0
Waddington W.w.
 75 3 2
Beach Creek Mobile Home Park
 67 1 1
Palomino Estates Water Company
 64 4 3
Seawood Estates Mutual Water Company
 63 1 1
Moonstone Heights Mwa
 33 1 0
Big Lagoon Park Water Co.
 20 0 0
Non-community systems (46: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Richardson Grove Sp-State Parks
 1,507 0 0
Caltrans-Trinidad NB
 1,000 1 0
Sue-Meg Sp-State Parks
 1,000 0 0
Gold Bluffs Beach Cg-State Parks
 998 0 0
Richardson Grove Campground & RV Park
 750 0 0
Van Duzen Humboldt Co. Parks
 551 0 0
Prairie Creek Sp-State Parks
 500 0 0
Stone Lagoon-State Parks
 402 0 0
Burlington Cg-State Parks
 368 0 0
Hidden Springs Cg-State Parks
 350 0 0
A W Way Humboldt Co. Parks
 301 0 0
Angelina
 300 0 0
Big Lagoon Humboldt Co. Parks
 300 0 0
Dean Creek Resort
 283 0 0
Larrupin Cafe
 247 1 1
Sylvan Harbor Trailer Park
 221 1 0
Chimney Tree
 200 0 0
Emerald Forest
 200 1 0
Founders Grove-State Parks
 200 0 0
View Crest Lodge
 174 0 0
Cuddeback Grammar School
 165 2 1
Grizzly Creek Sp-State Parks
 152 0 0
Fish Lake CG Srnf
 130 0 0
Ancient Redwoods Resort
 126 0 0
Moonstone Beach Trinidad
 125 0 0
Triumphant Life Camp
 110 0 0
Camp Trinidad RV Resort
 104 1 0
Redwood Empire G&cc
 102 0 0
Cal Fire-Eel River Conservation Camp
 100 2 1
Humboldt Creamery
Fortuna 		100 0 0
Fernbridge Cafe
 85 0 0
Cal Fire-High Rock Conservation Camp
 80 3 2
Honeydew Country Store
 76 0 0
Azalea Glen
 65 0 0
Ocean Grove Lodge
 53 0 0
Elk Country RV Resort and Campground
 51 0 0
Bridgeville Elem. School
 50 2 1
Casterlin School
 50 2 1
Mattole Elementary School
 50 2 1
Whitethorn Construction
 45 1 0
Kneeland School
 40 2 0
Whitethorn Elementary School
 33 2 1
Heartwood Institute
 30 0 0
Boise Creek Cg-Snrf
 25 0 0
King Range Admin-Blm
 25 0 0
M.f. Mitchell & Company
 25 2 0
Inactive systems (161, 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.