Yankton, City of Water Purification Facility — NPDES permit SD0028628: limits, due date and EPA's record

NPDES permit SD0028628 · Minor NON-POTW · administratively continued, expires 2024-09-30 · 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.

This permit expired on 2024-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (16)

Outfall	Parameter	Statistic	Limit	Months
003	Flow rate	30DA AVG	report only	all year
003	Flow rate	DAILY MX	report only	all year
003	Conductivity	30DA AVG	<= 33739 umho/cm	all year
003	Conductivity	DAILY MX	report only	all year
003	pH	DAILY MN	>= 6.5 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	Alkalinity, total [as CaCO3]	30DA AVG	<= 11770 mg/L	all year
003	Alkalinity, total [as CaCO3]	DAILY MX	report only	all year
003	Chloride [as Cl]	30DA AVG	<= 5021 mg/L	all year
003	Chloride [as Cl]	DAILY MX	report only	all year
003	Sulfate, total [as SO4]	30DA AVG	<= 10043 mg/L	all year
003	Sulfate, total [as SO4]	DAILY MX	<= 17574 mg/L	all year
003	Chlorine, total residual	DAILY MX	<= .382 mg/L	all year
003	Flow, total	MO TOTAL	report only	all year
003	Solids, total dissolved	30DA AVG	<= 8687 mg/L	all year
003	Solids, total dissolved	DAILY MX	<= 23751 mg/L	all year