What environmental databases are included?

This page aggregates data from eight EPA databases: Safe Drinking Water (SDWIS), Superfund/NPL sites, Toxic Release Inventory (TRI), Air Quality Index (AQI), Leaking Underground Storage Tanks (LUST), NPDES water discharge permits, RCRA hazardous waste, and Brownfields.

What does the Air Quality Index (AQI) mean?

AQI is measured on a scale from 0 to 500. Values under 50 are 'Good,' 51-100 is 'Moderate,' and above 100 is 'Unhealthy for Sensitive Groups.' AQI is measured at the county level since air quality monitoring stations are sparse. Your town shares its county's AQI reading.

What is a Superfund site?

A Superfund site is a location contaminated by hazardous waste that has been placed on the EPA's National Priorities List (NPL) for long-term cleanup. These sites pose serious risks to human health and the environment. Cleanup can take decades and cost hundreds of millions of dollars.

Algonac, MI Water Quality, EPA Sites & Air Quality Data

Environmental Reporti

Air Qualityi

39Good

Water Systemsi

4community / 8 total

Water Violationsi

TRI Facilitiesi

Active NPDESi

8/ 14 total

Air Quality — St. Clair County (2025)i

AQS

The Air Quality Index measures how clean or polluted the air is on a given day. AQI is reported at the county level. A score of 0–50 is considered good; 51–100 is moderate; above 100 may be unhealthy for sensitive groups.

Good

Median AQI

050100150200300

max 147

PM2.5 Daysi

Ozone Daysi

214

Drinking Wateri

SDWIS

Public water systems registered to serve this area. Community systems (CWS) provide water to residents year-round. Transient systems serve places like gas stations or restaurants. Violations indicate a system failed to meet federal drinking water standards.

Community Systemsi

Active Systemsi

Recent Violationsi

Community (4)

Transient (3)

Non-Transient (1)

Recent Violations (Last 5 Years)

CLAY TOWNSHIP

3 violationsLatest: 2022-04-01

EPA

Historical Violations (Over 5 Years Ago)

ALGONAC, CITY OF

1 violationLatest: 2020-07-01

EPA

Toxic Release Inventory (TRI)i

TRI

Factories, refineries, and other industrial facilities that use or store hazardous chemicals are required to report their releases annually to the EPA. Being listed here does not mean a violation occurred — it means the facility is transparently tracking its chemical usage.

Reporting Facilitiesi

With Chemical Datai

ALGONAC CAST PRODUCTS9300 STONE RD4 chemicals|TRI

FALLS FIBERGLAS PRODUCTS INC8061 MARSH RD|TRI

Wastewater & Stormwater Permits (NPDES)i

NPDES

Under the Clean Water Act, any facility that discharges wastewater or stormwater into rivers, lakes, or streams must hold an NPDES permit. "Effective" means the permit is currently active and the facility is authorized to discharge under its permit conditions.

Active Permitsi

Expired / Terminatedi

ALGONAC MS4-ST CLAIR805 ST. CLAIR RIVER DRIVEMinor Discharge|EPA

MACKIE MARINA-ALGONAC9715 ISLAND DRIVEMinor Discharge|EPA

BUDS GARAGE & AUTO MORTUARY9438 NOOK ROADMinor Discharge|EPA

MONNIER-ALGONAC2034 FRUIT STREETMinor Discharge|EPA

SASSY MARINE-ALGONAC9000 MERRILL DRIVEMinor Discharge|EPA

ST CLAIR COUNTY-ALGONAC WWTP451 STATE STMajor Discharge|EPA

ALGONAC SAND & SUPPLY LLC3480 FRUIT STREETMinor Discharge|EPA

ALGONAC HARBOUR CLUB1999 POINTE TREMBLEMinor Discharge|EPA

Cleanup Sites (Brownfields)i

EPA Brownfields

Former industrial or commercial properties where contamination has been found. "Remedy Complete" means cleanup is finished. "Construction Complete" means cleanup infrastructure is built but monitoring continues. "In Progress" means the site is still being investigated or cleaned up.

THREE VACANT PARCELS398-402 SHERWOOD LANEIn Progress|