PlainWater
Counties → California

Siskiyou County, California

Water Systems
72
Population Served
41,230
Total Violations
993
377 health-based
PFAS Detected
0
of 2 tested

Violation Analysis

88.9%
Systems with Violations
13.8
Avg Violations per System
38.0%
Health-Based Violations

Water Source Types

GW
44 systems (61%)
SW
6 systems (8%)

PFAS Contamination

2
Systems Tested
0
PFAS Detected
0.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Siskiyou California water systems by violation status, EPA SDWIS records.

No violations on record (2) One or more violations (48)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Yreka, City Of 7,825 5 Clean
Mt. Shasta, City Of 3,642 36 Clean
Mt. Shasta Ski Park 3,500 2 -
Lake Shastina C.s.d 2,790 14 -
Weed, City Of 2,662 21 -
Lake Siskiyou Campground 1,800 26 -
Dunsmuir, City Of 1,707 22 -
Caltrans-Collier Rest Stop 1,400 2 -
McCloud C.s.d. 1,317 35 -
Montague, City Of 1,264 23 -
Happy Camp C.s.d. 1,100 12 -
Caltrans-Weed Rest Stop 1,000 4 -
Dorris, City Of 887 13 -
Tulelake, City Of 856 8 -
Etna, City Of 720 14 -
Fort Jones, Town Of 695 25 -
Caltrans-Grass Lake Rest Stop 600 1 -
Siskiyou Lake Highlands MWC 549 5 -
Jh Ranch 403 2 -
Fowlers Campground-Stnf 360 26 -
Siskiyou Co. Rolling Hills MWC 300 13 -
R-Ranch Headquarters 300 19 -
R-Ranch Klamath River 300 15 -
Grenada Sanitary District 289 20 -
Hornbrook C.s.d. 280 47 -
Lake Siskiyou M.W.C. 277 33 -
Mdf-Medicine Lake 250 4 -
Lava Beds National Monument 245 0 -
Ash Creek Fire Station-Stnf 240 9 -
Caltrans-Dunsmuir Grade Insp. Facility 200 7 -
Kidder Creek Orchard Camp 200 3 -
Copco Lake MWC 181 32 -
Juniper Village Farm Labor Housing 170 2 -
Butteville Union School 165 4 -
Pneuma Retreat Center - Stewart Mineral 150 32 -
Monte Shasta M.W.C. 150 6 -
Doctor's Park Owners Association 150 3 -
Cal Ore Mobile Estates 146 15 -
Siskiyou Co.service Area #5/Carrick 143 12 -
Railroad Park Resort 140 0 -
Abrams Lake Mobile Estates 135 31 -
Shadow Mountain MHP 126 11 -
Weed Golf Club, Inc. 112 38 -
Sun Mountain M.W.C. 106 12 -
Cove Mobile Villa 105 31 -
Willow Creek School 100 15 -
Shasta Cascade Mobilehome Park 100 10 -
Big Springs Union Elem. School 95 9 -
McBride Springs Campground 80 2 -
Tennant C.s.d. 75 36 -

Other Counties in California

Los Angeles County
276 systems · 10,109,089 served · 3,972 violations
San Diego County
197 systems · 3,744,323 served · 4,832 violations
Orange County
46 systems · 3,201,893 served · 507 violations
Riverside County
201 systems · 2,839,125 served · 6,103 violations
San Bernardino County
318 systems · 2,830,626 served · 4,611 violations
Alameda County
27 systems · 2,249,634 served · 275 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Siskiyou County? ▼
Siskiyou County has 993 total drinking water violations across 72 water systems, of which 377 are health-based violations. 88.9% of systems have at least one violation.
How many people get water from Siskiyou County systems? ▼
Water systems in Siskiyou County serve approximately 41,230 people through 72 public water systems.
Has PFAS been detected in Siskiyou County water? ▼
Of 2 water systems tested for PFAS in Siskiyou County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Siskiyou County? ▼
Water systems in Siskiyou County use GW (44 systems), SW (6 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 38.0% of Siskiyou County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.