Clean Water Act discharge permit · NPDES MTDW0005I
HARDIN, CITY OF, Hardin, MT: NPDES MTDW0005I discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 23Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
HARDIN, CITY OF, held by City of Hardin WTP, holds NPDES permit MTDW0005I, which discharges to Bighorn River. EPA’s file records it issued March 2, 2022 and expiring June 30, 2024.
HARDIN, CITY OF, Hardin, Montana: Coverage under a general permit MTDW0005I, held by City of Hardin WTP; Administratively continued (past its expiration date and still in force until reissued); issued March 2, 2022, term to June 30, 2024; discharges to Bighorn River.
- pH: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Aluminum, total [as Al]: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Flow, total: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Flow, total: 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Hardness, total [as CaCO3]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Arsenic, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Selenium, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Thallium, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Beryllium, total recoverable [as Be]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Nickel, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Silver total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Zinc, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Cadmium, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Lead, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Chromium, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Copper, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Antimony, total recoverable: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Dichlorobromomethane: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Bromoform: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Chloroform: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Chlorodibromomethane: 2 limits, 2 violations of any kind, 0 effluent exceedances.
HARDIN, CITY OF among its neighbors
EPA’s permit file holds 13 discharge permits in the Bighorn River-Hardin subwatershed (HUC 100800150704), MTDW0005I among them. Its county holds 70, 3 of them major permits; MTDW0005I is a minor permit.
Other permits in the Bighorn River-Hardin subwatershed (HUC 100800150704)
- CITY OF HARDIN, Hardin: MTNOEIA00, minor permit, permit term to March 23, 2024
- CIVIGENICS, Hardin: MTR102264, not classed, discharging to WHITMAN COULEE
- CMG CONSTRUCTION - HARDIN SID 120, Hardin: MTR104703, minor permit, discharging to EXISTING DRAINAGE EASEMENT, permit term to December 31, 2012
- CROELL INCORPORATED HARDIN CONCRETE BATCH PLANT, Hardin: MTR000592, minor permit, discharging to LOWER BIG HORN, permit term to January 31, 2023
- HARDIN - SOUTH STPS 313-1(17)1, Hardin: MTR108674, minor permit, discharging to BIGHORN RIVER, permit term to December 31, 2022
- HARDIN WASTE WATER TREATMENT PLANT, Hardin: MTG071382, not classed, discharging to BIGHORN RIVER
- HARDIN WASTE WATER TREATMENT PLANT, Hardin: MTR111386, minor permit, discharging to BIGHORN RIVER, permit term to December 31, 2027
- HARDIN WASTEWATER TREATMENT PLANT, Hardin: MT0030759, major permit, discharging to BIG HORN RIVER, permit term to June 30, 2023
- HARDIN WWTP UPGRADES, Hardin: MTR10I060, minor permit, permit term to February 16, 2027
- MOSQUITO CONTROL LLC - BIG HORN PESTICIDE, Hardin: MTG870005, minor permit, discharging to LOWER BIGHORN RIVER, permit term to October 31, 2021
Identity
| Facility as filed | HARDIN, CITY OF |
|---|---|
| Permittee as filed | City of Hardin WTP |
| NPDES ID | MTDW0005I |
| 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 | Not a publicly owned treatment works |
| Issued | March 2, 2022 |
| Expiration date | June 30, 2024 |
| Address | Hardin, MT 59034 |
| Receiving water | Bighorn River |
| Subwatershed | Bighorn River-Hardin (HUC 100800150704) |
Effluent limits and exceedances
- 23Pollutants on file
- 23Under a numeric limit
- 23With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| pH | 4 | 16 | 0 | ||
| Solids, total suspended | 4 | 16 | 0 | ||
| Aluminum, total [as Al] | 4 | 16 | 0 | ||
| Chlorine, total residual | 4 | 16 | 0 | ||
| Flow, total | 2 | 8 | 0 | ||
| Flow, total | 2 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 2 | 0 | ||
| Arsenic, total recoverable | 2 | 2 | 0 | ||
| Selenium, total recoverable | 2 | 2 | 0 | ||
| Thallium, total recoverable | 2 | 2 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 2 | 0 | ||
| Nickel, total recoverable | 2 | 2 | 0 | ||
| Silver total recoverable | 2 | 2 | 0 | ||
| Zinc, total recoverable | 2 | 2 | 0 | ||
| Cadmium, total recoverable | 2 | 2 | 0 | ||
| Lead, total recoverable | 2 | 2 | 0 | ||
| Chromium, total recoverable | 2 | 2 | 0 | ||
| Copper, total recoverable | 2 | 2 | 0 | ||
| Antimony, total recoverable | 2 | 2 | 0 | ||
| Dichlorobromomethane | 2 | 2 | 0 | ||
| Bromoform | 2 | 2 | 0 | ||
| Chloroform | 2 | 2 | 0 | ||
| Chlorodibromomethane | 2 | 2 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTDW0005I.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MTDW0005I.
Inspections
EPA’s inspection file holds no inspection for NPDES MTDW0005I.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES MTDW0005I.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTDW0005I.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
Nearby on the register
- Discharge permits in Hardin
- Every permit record in Hardin, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.