Clean Water Act discharge permit · NPDES PR0026930

PRASA LAS MARIAS WTP, Las Marias, PR: NPDES PR0026930 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
13Pollutants under a numeric limit
5Pollutants with an effluent exceedance

PRASA LAS MARIAS WTP, held by PRASA Las Marias Potable Water Filtration Plant, holds NPDES permit PR0026930. EPA’s file records it issued November 17, 2017 and expiring January 31, 2023. 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	PRASA LAS MARIAS WTP
Permittee as filed	PRASA Las Marias Potable Water Filtration Plant
NPDES ID	PR0026930
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	November 17, 2017
Expiration date	January 31, 2023
Address	Las Marias, PR 00670
Receiving water impaired	303(D) Listed
Subwatershed	Rio Grande de Anasco at mouth (HUC 210100030212)

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

Effluent limits and exceedances

13Pollutants on file
13Under a numeric limit
13With a violation of any kind
5With 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
Copper, total [as Cu]	1	17	14	July 31, 2026	209% over the limit
Phosphorus, total [as P]	1	13	10	October 31, 2025	275% over the limit
Flow, in conduit or thru treatment plant	2	7	4	May 31, 2018	211% over the limit
Chlorine, total residual	1	6	3	August 31, 2023	355% over the limit
Oxygen, dissolved [DO]	1	4	1	February 28, 2023	92% over the limit
Ammonia & ammonium- total	1	11	0
pH	2	6	0
Sulfate, total [as SO4]	2	3	0
Cyanide, free available	2	3	0
Turbidity	1	3	0
BOD, 5-day, 20 deg. C	1	3	0
Whole Effluent Toxicity [WET] - P. promelas	2	1	0
Whole Effluent Toxicity [WET] - D. magna	2	1	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 PR0026930.

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 PR0026930 there.

Nearby on the register

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

This EPA-sourced public-records page covers NPDES permit PR0026930 for PRASA LAS MARIAS WTP in Las Marias, PR, held by PRASA Las Marias Potable Water Filtration Plant, which is listed as administratively continued with an issue date of November 17, 2017 and an expiration date of January 31, 2023. The page reports 13 pollutants on file, 13 under a numeric limit, 13 with a violation of any kind, and 5 with an effluent exceedance, within HUC 210100030212.