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Valley, ID

Low Risk (28/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.

Environmental data for Valley in Idaho · Population: 12,136

TRI sites such as Helco Portable Concrete Plant (donnelly) 302231; SDWIS systems such as MCCALL CITY OF; CASCADE CITY OF; FIR GROVE ESTATES; NPL sites such as Stibnite/Yellow Pine Mining Area anchor Valley, ID's EPA extract. Derived burden score 28/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Valley include MCCALL CITY OF; CASCADE CITY OF; FIR GROVE ESTATES, while Helco Portable Concrete Plant (donnelly) 302231 leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 155 in 2024.

Burden score 28/100 (Low Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Valley -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

County population (Census ACS)
12,136
TRI Facilities
1
Water Systems
10
Superfund Sites
1
Total Releases
181 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 235 (66%) 113 8 155
2023 255 (71%) 105 0 78
2022 241 (69%) 102 6 168
2021 217 (62%) 125 7 162
2020 205 (62%) 117 5 211
2024 Good Air Quality: 66% of days
Unhealthy days: 9
Median AQI: 37

Source: 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 Idaho, see the EPA's AirNow.gov.

Water Systems (10)

System System pop (SDWIS) Violations
MCCALL CITY OF 4,423 36
CASCADE CITY OF 1,000 2
FIR GROVE ESTATES 270 4
DAY STAR 250 2
DONNELLY CITY OF 237 1
JUGHANDLE ESTATES 200 0
JUG MOUNTAIN RANCH SUBDIVISION 100 0
KINGS PINES ESTATES WATER SYSTEM 96 0
YELLOW PINE WATER USERS INC 72 2
HAWKS BAY ESTATES HOA LLC 59 0

TRI Facilities (1)

# Facility Total Releases
1 Helco Portable Concrete Plant (donnelly) 302231 181 lbs

Superfund Sites (1)

Site Name Status HRS Score
Stibnite/Yellow Pine Mining Area Proposed NPL Site 50.00

Cities in Valley (4)

Donnelly
1 facilities · 4 water
Mccall
0 facilities · 4 water
Cascade
0 facilities · 1 water
Yellow Pine
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Valley, Idaho? ▼
Valley, ID has an environmental risk score of 28/100 (Low Risk), based on 1 TRI facilities, 1 Superfund sites, and 10 water systems on record. 6 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Valley? ▼
Yes, Valley, ID has 1 Superfund site on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in Valley? ▼
Valley, ID has 1 TRI-reporting facility on record with the EPA Toxic Release Inventory, with a combined total of 181 lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Valley? ▼
In 2024, Valley, ID recorded a median AQI of 37 and a peak AQI of 155. 66% 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 Valley? ▼
Valley, ID has 10 EPA-regulated water systems. 6 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 Valley? ▼
Environmental compliance in Valley, Idaho is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Idaho 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.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro