PlainWater
Counties → California

Nevada County, California

Water Systems
84
Population Served
103,625
Total Violations
1,551
767 health-based
PFAS Detected
1
of 6 tested

Violation Analysis

84.5%
Systems with Violations
18.5
Avg Violations per System
49.5%
Health-Based Violations

Water Source Types

GW
40 systems (48%)
SW
10 systems (12%)

PFAS Contamination

6
Systems Tested
1
PFAS Detected
16.7%
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

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

No violations on record (8) One or more violations (42)

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
Truckee-Donner PUD, Main 36,730 6 Detected
Nevada ID - E. George, Banner Mountain 17,154 0 Clean
Nevada ID - Loma Rica 14,072 0 Clean
Nevada ID - Lake Wildwood 9,108 0 Clean
Nevada ID - Lake of Pines 6,870 0 Clean
City of Grass Valley 4,947 4 Clean
City of Nevada City 3,148 5 -
South Yuba River State Park 800 3 -
Bitney Springs Center Water System 547 32 -
Mother Truckers Water System 450 0 -
Plavada Community Association 384 78 -
Penn Valley Shopping Center 332 27 -
Washington Water District 330 58 -
Martis Creek-US Army Corps of Engineers 322 2 -
Shady Creek Outdoor School 315 91 -
Donner Summit Public Utility District 310 27 -
Creekside Village 300 20 -
Wood Camp - Water System 281 7 -
Rough & Ready Village 268 95 -
Tahoe Timber Trails 254 1 -
Nid Scotts Flat Lake Reservoir 253 48 -
Pleasant Ridge School 250 28 -
Ananda Village 222 18 -
Skippers Cove 215 26 -
Lake Spaulding Campground 204 2 -
Peninsula Campground Water System 202 21 -
Harmony Ridge Resort 201 4 -
Sierra Energy #3 200 32 -
Kingvale Property Owners & Water Users 180 14 -
Clear Creek School 160 16 -
Camp Ross Relles 153 18 -
Marin Sierra Boy Scouts of America 151 33 -
Donner Mine Camp Inc 151 6 -
5 Mile House 150 2 -
Bigleys Market / Brass Rail 150 2 -
Camp Rucker Lake 150 23 -
Petersons Corner Water System 150 9 -
Harmony Ridge Market 150 0 -
Tahoe Forest Church 145 2 -
Diamond Arrow Conference Center 135 13 -
Sierra Family Medical Clinic 125 2 -
Twin Ridges Grizzly Hill School 125 31 -
Malakoff Diggins Shp 125 3 -
Twin Ridges Oak Tree School 120 33 -
Floriston Water System 110 33 -
Naggiar Vineyards 109 0 -
Truckee River RV Park 103 11 -
New Solutions Construction Water System 102 23 -
Heauser's Plaza Center 100 0 -
Sierra Estates Mutual Water Company 100 66 -

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 Nevada County? ▼
Nevada County has 1,551 total drinking water violations across 84 water systems, of which 767 are health-based violations. 84.5% of systems have at least one violation.
How many people get water from Nevada County systems? ▼
Water systems in Nevada County serve approximately 103,625 people through 84 public water systems.
Has PFAS been detected in Nevada County water? ▼
Of 6 water systems tested for PFAS in Nevada County, 1 had PFAS detected (16.7% detection rate).
What types of water sources supply Nevada County? ▼
Water systems in Nevada County use GW (40 systems), SW (10 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. 49.5% of Nevada 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.