Chilton Water Supply and Sewer Corporation

Sewerage Systems, Chilton, Texas. NPDES permit TX0053520, in force until Apr 19, 2029. Last 12 months: over a limit 29 times (last August 2026), 4 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 20 days after each period: form A monthly (18 values)

Last report on file

August 2026

Oct 2024 – Sep 2025

8 values over a limit, 0 required values missing, 2 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 29 values over a limit

Period ending	Parameter	Reported	Limit	Over by
January 2026	Nitrogen, ammonia total [as N], daily average	3.77 mg/L	≤ 3 mg/L	26%
March 2026	BOD, carbonaceous [5 day, 20 C], daily average	14.25 mg/L	≤ 10 mg/L	43%
March 2026	BOD, carbonaceous [5 day, 20 C], daily average	8.96 lb/d	≤ 8.8 lb/d	2%
March 2026	E. coli, daily average	130 CFU/100mL	≤ 126 CFU/100mL	3%
March 2026	Nitrogen, ammonia total [as N], daily average	15.75 mg/L	≤ 3 mg/L	425%
March 2026	Nitrogen, ammonia total [as N], daily average	8.57 lb/d	≤ 2.6 lb/d	230%
March 2026	Nitrogen, ammonia total [as N], single grab sample	39.1 mg/L	≤ 15 mg/L	161%
March 2026	Solids, total suspended, daily average	19.86 lb/d	≤ 13 lb/d	53%
March 2026	Solids, total suspended, daily average	25.75 mg/L	≤ 15 mg/L	72%
May 2026	Nitrogen, ammonia total [as N], daily average	6.69 mg/L	≤ 3 mg/L	123%
May 2026	Nitrogen, ammonia total [as N], daily average	8.93 lb/d	≤ 2.6 lb/d	243%
June 2026	E. coli, daily average	2420 CFU/100mL	≤ 126 CFU/100mL	1821%
June 2026	E. coli, single grab sample	2420 CFU/100mL	≤ 399 CFU/100mL	507%
June 2026	Nitrogen, ammonia total [as N], daily average	10.17 lb/d	≤ 2.6 lb/d	291%
June 2026	Nitrogen, ammonia total [as N], daily average	13.46 mg/L	≤ 3 mg/L	349%
June 2026	Nitrogen, ammonia total [as N], single grab sample	19 mg/L	≤ 15 mg/L	27%
July 2026	E. coli, single grab sample	2420 CFU/100mL	≤ 399 CFU/100mL	507%
July 2026	Nitrogen, ammonia total [as N], daily average	12.1 mg/L	≤ 3 mg/L	303%
July 2026	Nitrogen, ammonia total [as N], daily average	9.08 lb/d	≤ 2.6 lb/d	249%
July 2026	Nitrogen, ammonia total [as N], single grab sample	17.5 mg/L	≤ 15 mg/L	17%
August 2026	BOD, carbonaceous [5 day, 20 C], daily average	15 lb/d	≤ 8.8 lb/d	70%
August 2026	BOD, carbonaceous [5 day, 20 C], daily average	19 mg/L	≤ 10 mg/L	90%
August 2026	E. coli, daily average	2420 CFU/100mL	≤ 126 CFU/100mL	1821%
August 2026	E. coli, single grab sample	2420 CFU/100mL	≤ 399 CFU/100mL	507%
August 2026	Nitrogen, ammonia total [as N], daily average	22.88 lb/d	≤ 2.6 lb/d	780%
August 2026	Nitrogen, ammonia total [as N], daily average	27.81 mg/L	≤ 3 mg/L	827%
August 2026	Nitrogen, ammonia total [as N], single grab sample	37.1 mg/L	≤ 15 mg/L	147%
August 2026	Solids, total suspended, daily average	17.46 lb/d	≤ 13 lb/d	34%
August 2026	Solids, total suspended, daily average	21.25 mg/L	≤ 15 mg/L	42%

Limits in force (18)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 15 mg/L	all year
Solids, total suspended	single grab sample	≤ 60 mg/L	all year
Solids, total suspended	daily average	≤ 13 lb/d	all year
Nitrogen, ammonia total [as N]	daily average	≤ 3 mg/L	all year
Nitrogen, ammonia total [as N]	single grab sample	≤ 15 mg/L	all year
Nitrogen, ammonia total [as N]	daily average	≤ 2.6 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .105 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year
E. coli	daily average	≤ 126 CFU/100mL	all year
E. coli	single grab sample	≤ 399 CFU/100mL	all year
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 10 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	single grab sample	≤ 35 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 8.8 lb/d	all year

How strict are these limits?

Solids, total suspended, daily average 15 mg/L — stricter than 35% of 777 other minor industrial and other permits in Texas; 60% have the same limit

Solids, total suspended, single grab sample 60 mg/L — stricter than 15% of 553 other minor industrial and other permits in Texas; 80% have the same limit

Oxygen, dissolved [DO], monthly minimum at least 4 mg/L — stricter than 12% of 627 other minor industrial and other permits in Texas; 69% have the same limit

Your permit document is the final word. As JSON: /api/v1/permits/TX0053520 · MCP: https://passage-data.com/mcp