Clean Water Act discharge permit · NPDES SCG570038

CALHOUN COUNTY I-26 REST STOP WWTP, St Matthews, SC: NPDES SCG570038 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
4Pollutants with an effluent exceedance

CALHOUN COUNTY I-26 REST STOP WWTP, held by CALHOUN COUNTY, holds NPDES permit SCG570038. EPA’s file records it issued August 2, 2016 and expiring December 31, 2018. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	CALHOUN COUNTY I-26 REST STOP WWTP
Permittee as filed	CALHOUN COUNTY
NPDES ID	SCG570038
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	August 2, 2016
Expiration date	December 31, 2018
Issuing agency	State
Address	St Matthews, SC
Subwatershed	Middle Congaree River (HUC 030501100303)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

10Pollutants on file
10Under a numeric limit
10With a violation of any kind
4With 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
E. coli	8	153	5	March 31, 2016	706% over the limit
Nitrogen, ammonia total [as N]	8	152	4	February 29, 2016	116% over the limit
Solids, total suspended	4	12	4	March 31, 2016	223% over the limit
Solids, suspended percent removal	1	38	1	March 31, 2016	100% over the limit
BOD, 5-day, 20 deg. C	4	148	0
pH	2	74	0
Flow, in conduit or thru treatment plant	2	74	0
Phosphorus, total [as P]	4	60	0
Oxygen, dissolved [DO]	1	37	0
BOD, 5-day, percent removal	1	37	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES SCG570038.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID SCG570038 there.

Nearby on the register

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

This public-records page covers the NPDES discharge permit SCG570038 held by Calhoun County for the CALHOUN COUNTY I-26 REST STOP WWTP in St Matthews, SC, with a status of administratively continued and a Minor Discharger class. The file lists 10 pollutants on file, 10 under a numeric limit, 10 with a violation of any kind, and 4 with an effluent exceedance.