CASTROVILLE, CITY OF — NPDES permit TX0129364: limits, due date and EPA's record

NPDES permit TX0129364 · Minor POTW · effective, expires 2031-02-06 · EPA's file as of 2026-09-19

Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

Last period with anything received: 2026-08-31. Most often over: BOD, carbonaceous [5 day, 20 C] (2).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).

Limits in force (21)

Outfall	Parameter	Statistic	Limit	Months
002	Oxygen, dissolved [DO]	MO MIN	>= 4 mg/L	all year
002	pH	MINIMUM	>= 6 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Solids, total suspended	DAILY AV	<= 5 mg/L	all year
002	Solids, total suspended	DAILY MX	<= 20 mg/L	all year
002	Solids, total suspended	DAILY AV	<= 29 lb/d	all year
002	Nitrogen, ammonia total [as N]	DAILY AV	<= 2 mg/L	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 10 mg/L	all year
002	Nitrogen, ammonia total [as N]	DAILY AV	<= 12 lb/d	all year
002	Phosphorus, total [as P]	DAILY AV	<= 1 mg/L	all year
002	Phosphorus, total [as P]	DAILY MX	<= 4 mg/L	all year
002	Phosphorus, total [as P]	DAILY AV	<= 5.8 lb/d	all year
002	Flow, in conduit or thru treatment plant	DAILY AV	<= .7 MGD	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Chlorine, total residual	MO MIN	>= 1 mg/L	all year
002	Chlorine, total residual	MO MAX	<= 4 mg/L	all year
002	E. coli	DAILY AV	<= 126 CFU/100mL	all year
002	E. coli	DAILY MX	<= 399 CFU/100mL	all year
002	BOD, carbonaceous [5 day, 20 C]	DAILY AV	<= 5 mg/L	all year
002	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 20 mg/L	all year
002	BOD, carbonaceous [5 day, 20 C]	DAILY AV	<= 29 lb/d	all year