EPA-regulated facilities in Ascension Parish, LA

There are 2,332 EPA-regulated facilities inside Ascension Parish, Louisiana. The most common kinds are water discharge (1,637), hazardous waste (558), air emissions (170). 93 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 181 have a violation on record. Penalties over the last five years total $4.1M across 70 sites.

Open the map of Ascension Parish

2,332facilities in the county

93in significant noncompliance

181with a violation on record

$4.1Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	558
Treatment, storage or disposal	6
Large quantity generators	27
Small quantity generators	347
Transporters	24
Chemical (RMP/TRI)	63
Superfund	6
Air emissions	170
Major sources	31
Synthetic minor sources	8
Minor sources	66
Water discharge	1,637
Major permits	19
Minor permits	1,575
Drinking water systems	113
Greenhouse gas reporters	22

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

PCS NITROGEN FERTILIZER LP - GEISMAR AGRICULTURAL NITROGEN & PHOSPHATE PLANT 10886 HWY 75, GEISMAR, LA, 70734 Significant noncompliance · $1.7M in penalties
OCCIDENTAL CHEMICAL CORPORATION - GEISMAR FACILITY 8318 ASHLAND RD, GEISMAR, LA, 70734 Significant noncompliance · $500k in penalties
RUBICON LLC - GEISMAR FACILITY 9156 HWY 75, GEISMAR, LA, 70734 Significant noncompliance · $42k in penalties
MAGNOLIA WATER UTILITY OPERATING CO., LLC- SOUTHWOOD VILLAGE 37254 SOUTHWOOD VILLAGE AVENUE, PRAIRIEVILLE, LA, 70727 Significant noncompliance · $40k in penalties
BASF CORP - GEISMAR SITE 8404 RIVER RD (HWY 75), GEISMAR, LA, 70734 Significant noncompliance · $35k in penalties
LA AIRLINE PLAZA LLC- OAK GROVE SHOPPING CENTER 17188 AIRLINE HWY, PRAIRIEVILLE, LA, 70769 Significant noncompliance · $25k in penalties
NATIONAL WATER INFRASTRUCTURE, LLC - DUTCHTOWN LANE SUBDIVISION 12322 DUTCHTOWN LANE, GONZALES, LA, 70737 Significant noncompliance · $21k in penalties
NWI, LLC- ULTIMA PLAZA STP 37474 ULTIMA PLAZA BLVD, PRAIRIEVILLE, LA, 70769 Significant noncompliance · $20k in penalties
HECK INDUSTRIES, LLC 38429 HWY 30, GONZALES, LA, 70000 Significant noncompliance · $6k in penalties
WHITE ROAD MOBILE HOME PARK 37113 WHITE ROAD, PRAIRIEVILLE, LA, 70769 Significant noncompliance · $1k in penalties

Largest penalties

Penalties assessed over the last five years.

HOME DEPOT #383 2740 S. CAJUN AVE., GONZALES, LA, 70737 $285k in penalties
ROF #5708 (THD RENTAL) 36326 HWY 30, GEISMAR, LA, 70734 $285k in penalties
LOWE'S HOME CENTERS LLC - STORE #2645 12484 AIRLINE HWY, GONZALES, LA, 70737 $142k in penalties
GEISMAR FRACTIONATION PLANT 10334 LA-75, GEISMAR, LA, 70734 $77k in penalties
QUALAWASH HOLDINGS LLC - QUALA - GEISMAR TERMINAL 260 35072 HIGHWAY 30, GEISMAR, LA, 70734 $44k in penalties

Superfund sites

CLEVE REBER SEC 36 T10S R3E, SORRENTO, LA, 70778
GONZALES HM & BAILEY PROPERTY HWY 429, 2.2 MILES E OF HWY 61, GONZALES, LA, 70734
DUTCHTOWN TREATMENT PLANT I10 & HWY 74, ASCENSION PARISH, LA, 70734
OLD INGER OIL REFINERY HWY 75 4 1/2 MI N OF TOWN, DARROW, LA, 70725
WESTLAKE VINYLS CO LP - GEISMAR FACILITY 36045 E HWY 30, GEISMAR, LA, 70734
WILLIAMS OLEFIN GEISMAR EXPLOSION 5205 LA HWY 3115, GEISMAR, LA, 70734

Towns in Ascension Parish

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.