PlainEnviro

Placer, CA

Moderate Risk (36/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Placer in California · Population: 412,435

Placer, CA is tracked across three EPA datasets covering 11 Toxics Release Inventory (TRI) facilities, 54 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 36/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 127.0K lbs of reported toxic releases under EPCRA Section 313, while 18 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 50 and a peak AQI of 140 in 2024, with 51% of observed days rated "Good" (0–50).

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population
412,435
TRI Facilities
11
Water Systems
54
Superfund Sites
0
Total Releases
127.0K lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year Good Moderate Unhealthy (SG) Max AQI
2024 188 (51%) 151 27 140
2023 164 (45%) 193 8 143
2022 156 (43%) 185 15 442
2021 130 (36%) 187 30 692
2020 130 (36%) 195 20 247
2024 Good Air Quality: 51% of days
Unhealthy days: 27
Median AQI: 50

Source: EPA Air Quality System (AQS) Annual AQI by County EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in California, see the EPA's AirNow.gov.

Water Systems (54)

System Population Violations
CITY OF ROSEVILLE 155,612 0
PLACER CWA - FOOTHILL 89,544 0
CITY OF LINCOLN 54,538 0
SAN JUAN WATER DISTRICT 29,598 0
PLACER CWA - AUBURN/BOWMAN 27,294 0
FORESTHILL PUBLIC UTILITY DIST 6,782 0
NORTH TAHOE PUD - MAIN 6,321 1
TAHOE CITY PUD - MAIN 5,661 0
MEADOW VISTA CWD 4,183 0
TAHOE CITY PUD - TAHOE SWISS VILLAGE 3,363 2
PLACER CWA - COLFAX 3,149 0
FULTON WATER COMPANY 2,593 2
AGATE BAY WATER COMPANY 2,500 2
ALPINE SPRINGS COUNTY WATER DISTRICT 2,200 0
PCWA - WEIMAR 1,689 0
MIDWAY HEIGHTS C. W. D. 1,491 0
OLYMPIC VALLEY PSD 1,165 0
TAHOE CITY PUD - MCKINNEY/QUAIL 844 0
TAHOE CITY PUD - TAHOE CEDARS 793 0
PLACER CWA - ALTA 748 0
TAHOE CITY PUD - RUBICON 703 0
PLACER CSA - SHERIDAN 653 0
NORTH TAHOE PUD - CARNELIAN WOODS 524 0
NORTH TAHOE PUD - DOLLAR COVE 507 1
HIDDEN VALLEY COMMUNITY ASSOCIATION 499 0
WARD WELL WATER COMPANY 425 0
FOLSOM LAKE MUTUAL WATER CO 333 0
DONNER SUMMIT PUBLIC UTILITY DISTRICT 310 11
TAHOE CITY PUD - MADDEN CREEK 300 0
TALMONT RESORT IMPROVEMENT DISTRICT 300 0
AUBURN VALLEY COMMUNITY SERVICE DIS 290 0
HEATHER GLEN COMMUNITY SERVICE DIST 250 2
ALPINE MEADOWS PROPERTY OWNERS ASSO 250 0
TAHOE CITY PUD - ALPINE PEAKS 201 0
TAHOE CITY PUD - TIMBERLAND 200 0
PLACER CWA - APPLEGATE 190 0
ANDREWS ESTATES 178 0
BAKER RANCH WATER CORP 150 1
RIVERBEND MOBILE HOME & RV PARK 137 1
EMIGRANT GAP MUTUAL WATER CO. 125 0
BARRON LAKE/ROSEBUSH 114 4
PLACER CWA - BIANCHI ESTATES 110 0
GOLDEN HILLS MUTUAL WATER CO 84 0
OAKLANE MOBILE VILLAGE, LLC. 75 0
GOLD HILL MOBILEHOME PARK 75 0
MOKELUMNE MOBILE SENIOR PARK 55 1
MEADOWBROOK OAKS 50 1
PLACER CWA - MONTE VISTA 46 1
EDGEWATER MOBILE HOME PARK 40 42
EVERGREEN MOBILE HOME PARK 36 2
SHASTINA MOBILE ESTATES 32 1
ROSECREST MUTUAL 31 1
SEGURA'S RV PARK LLC 27 4
WHEATLAND PARK ESTATES 26 0

TRI Facilities (11)

# Facility Total Releases
1 Sierra Pacific Industries Lincoln Div 86.1K lbs
2 H.b. Fuller Co 23.4K lbs
3 Tsi Semiconductors America, LLC 10.8K lbs
4 Gladding McBean 5.5K lbs
5 Alpha/dyno Nobel 1.0K lbs
6 Robert Bosch Semiconductor LLC 238 lbs
7 Greenheck Fan Corp - Rocklin California 2 lbs
8 Martis Valley Plant 0 lbs
9 Vulcan Materials Co Roseville Asphalt Plant 0 lbs
10 Cemex Lincoln 0 lbs
11 Keysight Technologies Inc 0 lbs

Cities in Placer (4)

Lincoln
Pop: -
4 facilities · 2 water
Roseville
Pop: -
5 facilities · 5 water
Truckee
Pop: -
2 facilities · 5 water
Rocklin
Pop: -
1 facilities · 3 water

Frequently Asked Questions

What is the environmental risk level in Placer, California? ▼
Placer, CA has an environmental risk score of 36/100 (Moderate Risk), based on 11 TRI facilities, 0 Superfund sites, and 54 water systems on record. 18 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Placer? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Placer, CA in the EPA database.
How many toxic release facilities are in Placer? ▼
Placer, CA has 11 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 127.0K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Placer? ▼
In 2024, Placer, CA recorded a median AQI of 50 and a peak AQI of 140. 51% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Placer? ▼
Placer, CA has 54 EPA-regulated water systems. 18 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Placer? ▼
Environmental compliance in Placer, California is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the California state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

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

Related

Browse all → | Rankings →
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial