Clean Water Act discharge permit · NPDES NC0085812

GRASSY BRANCH WWTP, Monroe, NC: NPDES NC0085812 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
9Pollutants under a numeric limit
7Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

GRASSY BRANCH WWTP, held by Union County, holds NPDES permit NC0085812. EPA’s file records it issued October 8, 2018 and expiring October 31, 2023.

GRASSY BRANCH WWTP, Monroe, North Carolina: Individual permit NC0085812, held by Union County; Publicly owned treatment works; Effective; issued October 8, 2018, term to October 31, 2023.

Flow, in conduit or thru treatment plant: 1 limit, 50 violations of any kind, 43 effluent exceedances, latest February 28, 2026, largest 113% over the limit.
BOD, 5-day, 20 deg. C: 5 limits, 76 violations of any kind, 29 effluent exceedances, latest March 31, 2026, largest 2,473% over the limit.
Coliform, fecal MF, MFC broth, 44.5 C: 2 limits, 29 violations of any kind, 26 effluent exceedances, latest August 31, 2025, largest 2,900% over the limit.
Nitrogen, ammonia total [as N]: 4 limits, 14 violations of any kind, 9 effluent exceedances, latest April 30, 2019, largest 102% over the limit.
Solids, total suspended: 3 limits, 50 violations of any kind, 5 effluent exceedances, latest March 31, 2020, largest 293% over the limit.
Oxygen, dissolved [DO]: 5 limits, 64 violations of any kind, 1 effluent exceedance, latest May 31, 2026, largest 11% over the limit.
pH: 2 limits, 3 violations of any kind, 1 effluent exceedance, latest December 31, 2018.
Temperature, water deg. centigrade: 5 limits, 177 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 1 limit, 1 violation of any kind, 0 effluent exceedances.

North Carolina holds 95 Publicly owned treatment works coverages of this permit type in EPA’s file; 26 were issued before NC0085812. Union County holds 15 permits in North Carolina.

Other permits held by Union County

TALLWOOD ESTATES WWTP, Indian Trail: NC0069523, issued October 25, 2013
UNION COUNTY EMERGENCY SERVICES COMPLEX, Monroe: NCC212290, issued April 1, 2024
TWELVE MILE CREEK WRF 9.0 MGD EXPANSION, Waxhaw: NCC232631, issued April 1, 2024
CROOKED CREEK TRUNK SEWER PHASE II INTECEPTOR IMPROVEMENTS, Indian Trail: NCC241718, issued June 7, 2024
GRASSY BRANCH WRF EXPANSION, Monroe: NCC242753, issued September 5, 2024
FY22 SHORT WATER LINE EXTENSION PHASE D (DOCTOR BLAIR ROAD), Marshville: NCC252192, issued July 24, 2025
FY22 SHORT WATER LINE EXTENSIONS - PHASEC, Monroe: NCC252901, issued September 30, 2025
FY22 SHORT WATER LINE EXTENSIONS - PHASEA, Indian Trail: NCC260035, issued January 28, 2026
MOORES PARK WATER MAIN EXTENSION, Indian Trail: NCC261241, issued May 15, 2026
CROOKED CREEK WWTP #2, Monroe: NCG110070, issued June 1, 2023

Coverages issued nearest NC0085812

July 16, 2018: RIVERSTONE INDUSTRIAL PARK WWTP, Forest City, NC0087084, held by Town of Forest City
August 14, 2018: HENRY FORK WWTP, Hickory, NC0040797, held by City of Hickory
August 20, 2018: GRASSY GAP CREEK WWTP, Banner Elk, NC0022730, held by Town of Beech Mountain
September 6, 2018: FRENCH BROAD RIVER WRF, Asheville, NC0024911, held by Metropolitan Sewerage District of Buncombe County North Carolina
September 25, 2018: ROXBORO WWTP, Roxboro, NC0021024, held by City of Roxboro
February 11, 2019: FOURTH CREEK WWTP, Statesville, NC0031836, held by City of Statesville
May 31, 2019: MANTEO WWTP, Manteo, NC0079057, held by Town of Manteo
June 17, 2019: EAST BEND INDUSTRIAL PARK WWTP, East Bend, NC0064726, held by Town of East Bend
June 30, 2019: CHEROKEE WASTEWATER TREATMENT PLANT, Cherokee, NC0052469, held by Eastern Band Cherokee Indians - Qualla Boundary (Cherokee WWTP)
October 21, 2019: BADIN WWTP, Badin, NC0074756, held by Greater Badin Water & Sewer District

GRASSY BRANCH WWTP among its neighbors

EPA’s permit file holds 8 discharge permits in the Lower Richardson Creek subwatershed (HUC 030401050507), NC0085812 among them.

Other permits in the Lower Richardson Creek subwatershed (HUC 030401050507)

CORNING INCORPORATED- MIDLAND, Midland: NCG070233, minor permit, permit term to May 31, 2028
FIBER OPTIC FACILITY, Midland: NC0086169, minor permit, permit term to October 31, 2023
MCGEE BROTHERS CO INCORPORATED, Midland: NCG140288, minor permit, permit term to June 30, 2022
MESSER LLC, Midland: NCG500604, minor permit, permit term to November 30, 2025
TALLWOOD ESTATES WWTP, Indian Trail: NC0069523, minor permit, permit term to October 31, 2018
UFP SITE BUILT, LLC, PLANT 417, Locust: NCG210519, minor permit, permit term to May 31, 2028
UFP SITE BUILT, LLC, PLANT 513, Stanfield: NCG210520, minor permit, permit term to May 31, 2028

Identity

Facility as filed	GRASSY BRANCH WWTP
Permittee as filed	Union County
NPDES ID	NC0085812
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	October 8, 2018
Expiration date	October 31, 2023
Address	Monroe, NC 28111
Subwatershed	Lower Richardson Creek (HUC 030401050507)

Effluent limits and exceedances

9Pollutants on file
9Under a numeric limit
9With a violation of any kind
7With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Flow, in conduit or thru treatment plant	1	50	43	February 28, 2026	113% over the limit
BOD, 5-day, 20 deg. C	5	76	29	March 31, 2026	2,473% over the limit
Coliform, fecal MF, MFC broth, 44.5 C	2	29	26	August 31, 2025	2,900% over the limit
Nitrogen, ammonia total [as N]	4	14	9	April 30, 2019	102% over the limit
Solids, total suspended	3	50	5	March 31, 2020	293% over the limit
Oxygen, dissolved [DO]	5	64	1	May 31, 2026	11% over the limit
pH	2	3	1	December 31, 2018
Temperature, water deg. centigrade	5	177	0
Chlorine, total residual	1	1	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES NC0085812.

Inspections

EPA’s inspection file holds no inspection for NPDES NC0085812.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES NC0085812.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers the Clean Water Act discharge permit NPDES NC0085812 for GRASSY BRANCH WWTP in Monroe, NC, held by Union County, with the permit shown as Effective and classed as a Minor discharger. The facts list 9 pollutants on file, 9 under a numeric limit, 9 with a violation of any kind, and 7 with an effluent exceedance.