EPA · discharge permits by pollutant and parameter
Hardness, total [as CaCO3]
- 2,593Permits carrying a limit
- 16With a recorded exceedance
- 44States
EPA identifies this parameter by code 00900. A permit listed here carries a numeric limit on hardness, total [as caco3] in its discharge; an exceedance is a monitoring result above that limit, as reported to EPA.
By state
- Kentucky387
- Ohio374
- Connecticut225
- West Virginia225
- Arizona125
- Virginia113
- Illinois102
- California100
- Missouri94
- Massachusetts94
- Kansas88
- Florida61
- New Hampshire58
- Montana57
- Washington48
- Georgia47
- North Dakota42
- Rhode Island40
- Idaho35
- Indiana33
- Maryland32
- Wisconsin28
- South Dakota26
- Nevada16
- North Carolina13
- Texas13
- Wyoming12
- South Carolina11
- Oregon10
- Pennsylvania9
- Tennessee9
- Colorado8
- Oklahoma7
- Alaska7
- Minnesota5
- New Jersey5
- New York4
- New Mexico4
- Mississippi4
- Michigan4
- Louisiana3
- Delaware3
- Vermont3
- Arkansas3
By watershed
The subbasins of the national Watershed Boundary Dataset carrying the most permits with a limit on hardness, total [as caco3].
- Subbasin 0108020569
- Subbasin 0110000549
- Subbasin 0510020546
- Subbasin 0507020140
- Subbasin 0110000436
- Subbasin 0513010134
- Subbasin 0506000134
- Subbasin 0109000431
- Subbasin 0504000128
- Subbasin 0514010127
- Subbasin 0110000623
- Subbasin 0514010223
- Subbasin 0604000621
- Subbasin 0505000620
- Subbasin 0307010320
- Subbasin 0505000919
- Subbasin 0508000218
- Subbasin 0507010118
- Subbasin 1505030118
- Subbasin 0509020317
- Subbasin 0509020217
- Subbasin 0107000616
- Subbasin 0110000316
- Subbasin 1107020716
- Subbasin 0507020316
- Subbasin 0503010116
- Subbasin 0509020116
- Subbasin 0108020715
- Subbasin 0508000115
- Subbasin 0502000115
- Subbasin 0108020115
- Subbasin 0207001014
- Subbasin 0410001114
- Subbasin 0514020114
- Subbasin 0109000314
- Subbasin 0411000114
- Subbasin 0505000514
- Subbasin 0714010614
- Subbasin 0502000314
- Subbasin 0411000214
- Subbasin 0110000114
- Subbasin 0510010113
- Subbasin 0503010313
- Subbasin 0504000613
- Subbasin 1507010213
- Subbasin 0506000212
- Subbasin 0109000112
- Subbasin 0505000712
- Subbasin 0510010212
- Subbasin 0511000311
- Subbasin 1027010411
- Subbasin 0511000111
- Subbasin 0514020211
- Subbasin 0511000511
- Subbasin 0410001011
- Subbasin 0509010311
- Subbasin 0503010611
- Subbasin 1505010011
- Subbasin 0503020410
- Subbasin 0301020110
- Subbasin 0511000610
- Subbasin 0106000310
- Subbasin 0410000710
- Subbasin 020600039
- Subbasin 020801069
- Subbasin 051401039
- Subbasin 010802029
- Subbasin 030902068
- Subbasin 180702038
- Subbasin 150601068
- Subbasin 110300138
- Subbasin 050302018
- Subbasin 010801068
- Subbasin 050302028
- Subbasin 101101018
- Subbasin 041000098
- Subbasin 020700088
- Subbasin 050600038
- Subbasin 180101108
- Subbasin 170300038
- Subbasin 010700058
- Subbasin 030801038
- Subbasin 103001018
- Subbasin 050200028
- Subbasin 051100028
- Subbasin 010700038
- Subbasin 101301017
- Subbasin 051302057
- Subbasin 050500047
- Subbasin 050500027
- Subbasin 170103057
- Subbasin 010900027
- Subbasin 010900057
- Subbasin 102400117
- Subbasin 102701027
- Subbasin 050400057
- Subbasin 020802087
- Subbasin 020801047
- Subbasin 050400047
- Subbasin 050200047
- Subbasin 020700027
- Subbasin 150701037
- Subbasin 051402046
- Subbasin 103001026
- Subbasin 070900056
- Subbasin 170501146
- Subbasin 050302036
- Subbasin 051301036
- Subbasin 010802066
- Subbasin 010700046
- Subbasin 020700046
- Subbasin 150701016
- Subbasin 150601036
- Subbasin 071401016
- Subbasin 100301016
- Subbasin 051402066
- Subbasin 041000126
- Subbasin 010802046
- Subbasin 150100156
- Subbasin 051201115
- Subbasin 020700115
- Subbasin 050901015
- Subbasin 030601045
- Subbasin 071300015
- Subbasin 020802065
- Subbasin 180201265
- Subbasin 020600065
- Subbasin 080102015
- Subbasin 051002045
- Subbasin 071401025
- Subbasin 170102025
- Subbasin 071401055
- Subbasin 051201015
- Subbasin 170103025
- Subbasin 051401045
- Subbasin 071402045
- Subbasin 110100025
- Subbasin 110300185
- Subbasin 101702035
- Subbasin 050400025
- Subbasin 011000025
- Subbasin 051002015
- Subbasin 020801085
- Subbasin 170800055
- Subbasin 050400035
- Subbasin 020802035
- Subbasin 051100045
- Subbasin 031001015
- Subbasin 180400034
- Subbasin 102600084
- Subbasin 150301014
- Subbasin 070700024
- Subbasin 041100044
- Subbasin 050702044
- Subbasin 030801014
- Subbasin 102901084
- Subbasin 150502024
- Subbasin 180400134
- Subbasin 101900094
- Subbasin 110701034
- Subbasin 051201064
- Subbasin 110300104
- Subbasin 051201134
- Subbasin 070700034
- Subbasin 050500084
- Subbasin 050901044
- Subbasin 050800034
- Subbasin 170102014
- Subbasin 051402034
- Subbasin 010801034
- Subbasin 010700014
- Subbasin 020700074
- Subbasin 071100084
- Subbasin 071300074
- Subbasin 090201044
- Subbasin 041000054
- Subbasin 080202044
- Subbasin 051202084
- Subbasin 180201254
- Subbasin 051202014
- Subbasin 110300124
- Subbasin 071200044
- Subbasin 050200063
- Subbasin 090201053
- Subbasin 101600033
- Subbasin 050200053
- Subbasin 041000043
- Subbasin 031403053
- Subbasin 110100073
- Subbasin 020802023
- Subbasin 071100063
- Subbasin 071300113
- Subbasin 030602013
- Subbasin 102902013
- Subbasin 041000063
- Subbasin 020402013
- Subbasin 101701023
- Subbasin 030501053
- Subbasin 110300173
- Subbasin 031300063
- Subbasin 051002033
- Subbasin 170102083
- Subbasin 180400123
- Subbasin 030102043
- Subbasin 071200033
- Subbasin 150100043
- Subbasin 180300073
- Subbasin 171001043
- Subbasin 020700053
- Subbasin 150602023
- Subbasin 110702053
- Subbasin 180201633
- Subbasin 103001043
- Subbasin 180701053
- Subbasin 031102063
- Subbasin 031002063
- Subbasin 101202023
- Subbasin 030401053
- Subbasin 103001033
- Subbasin 041504023
- Subbasin 180201613
- Subbasin 071401033
- Subbasin 060102073
- Subbasin 102901023
- Subbasin 030502083
- Subbasin 051002023
- Subbasin 070400073
- Subbasin 020402023
- Subbasin 171100143
- Subbasin 020801033
- Subbasin 041000083
- Subbasin 030701023
- Subbasin 051402053
- Subbasin 103002003
- Subbasin 030801023
Permits
| Permit holder | NPDES ID | City | State | Program | Discharger | Receiving water |
|---|---|---|---|---|---|---|
| CORPUS CHRISTI, CITY OF | TXS000601 | CORPUS CHRISTI | TX | Large municipal storm sewer systems | Major | |
| MOBERLY WWTP | MO0117960 | MOBERLY | MO | Publicly owned treatment works | Major | Tributary to Coon Creek |
| EAGLEPICHER TECHNOLOGIES, LLC | MO0002348 | JOPLIN | MO | Industrial stormwater | Major | Turkey Cr. |
| HILTON HEAD NO 1 PSD WWTP | SC0046191 | HILTON HEAD, SC 29925 | SC | Publicly owned treatment works | Major | Broad River-Port Royal Sound |
| CITY OF WACO MS4 | TXS002001 | WACO | TX | Publicly owned treatment works | Major | Cottonwood Creek-Brazos River |
| DOE RUN, BUICK MINE/MILL | MO0002003 | BOSS | MO | Major | Strother Creek | |
| CITY OF AUSTIN MS4 | TXS000401 | AUSTIN | TX | Large municipal storm sewer systems | Major | VARIOUS DITCHES AND TRIBUTARIES, LA |
| STRUTHERS WWTP | OH0027600 | STRUTHERS | OH | Publicly owned treatment works | Major | Mahoning River |
| BOISE, CITY OF - LANDER STREET WWTP | ID0020443 | BOISE | ID | Publicly owned treatment works | Major | BOISE RIVER (RIVER MILE 49.7) |
| SEWERAGE & WATER BD OF NEW ORLEANS -EAST BANK | LAS000301 | NEW ORLEANS | LA | Large municipal storm sewer systems | Major | Metairie Canal-Canal No 2 |
| CITY OF LAREDO MS4 | TXS001401 | LAREDO | TX | Large municipal storm sewer systems | Major | Zacata Creek-Rio Grande |
| CITY OF AMARILLO MS4 | TXS000201 | AMARILLO | TX | Large municipal storm sewer systems | Major | Upper East Amarillo Creek |
| LA PLATA WWTP | MD0020524 | LA PLATA | MD | Publicly owned treatment works | Major | UNNAMED TRIB. OF PORT TABACCO CK |
| CITY OF SAN ANTONIO MS4 | TXS001901 | SAN ANTONIO | TX | Large municipal storm sewer systems | Major | Beitel Creek-Salado Creek |
| LITTLE ROCK, CITY OF/AHTD MS4 | ARS000002 | LITTLE ROCK | AR | Large municipal storm sewer systems | Major | TRIBS,ARKANSAS RV |
| DOE RUN, GLOVER FACILITY | MO0001121 | ANNAPOLIS | MO | Major | Tributary to Scoggins Branch | |
| JEFFERSON PARISH - MS4 | LAS000201 | JEFFERSON | LA | Large municipal storm sewer systems | Major | Duncan Canal-Canal No 2 |
| RACINE WASTEWATER UTILITY | WI0025194 | RACINE | WI | Publicly owned treatment works | Major | L MICHIGAN |
| BEDFORD WASTEWATER TREATMENT PLANT | OH0024040 | BEDFORD | OH | Publicly owned treatment works | Major | Wood Creek |
| MARSHALL STEAM STATION | NC0004987 | TERRELL | NC | Major | Irish Buffalo Creek | |
| CITY OF NEWARK WASTEWATER TREATMENT PLANT | OH0026671 | NEWARK | OH | Publicly owned treatment works | Major | Licking River |
| MESA NORTHWEST WRP | AZ0024627 | MESA | AZ | Publicly owned treatment works | Major | SALT RIVER |
| PEARL RIVER WASTEWATER TREATMENT FACILITY | MS0053503 | PHILADELPHIA | MS | Publicly owned treatment works | Major | WOLF CREEK TO KENTAWKA CANAL TO PEARL RIVER |
| HANNIBAL DEVELOPMENT PARTNERS | OH0011550 | HANNIBAL | OH | Major | Ohio River | |
| DAWN MINING COMPANY LLC - MIDNITE MINE | WA0025721 | WELLPINIT | WA | Major | BLUE CREEK | |
| LIVE OAK WWTP | CA0079022 | LIVE OAK | CA | Publicly owned treatment works | Major | Sacramento |
| THE CITY OF BOWIE WASTEWATER TREATMENT PLANT | MD0021628 | BOWIE | MD | Publicly owned treatment works | Major | UNNAMED DITCH-PATUXENT RIVER |
| CITY OF PASADENA MS4 | TXS001701 | PASADENA | TX | Large municipal storm sewer systems | Major | VARIOUS DITCHED, HOUSTON SHIP CHANN |
| PAINTED MESA WATER RECLAMATION FACILITY | AZ0025542 | HOLBROOK | AZ | Publicly owned treatment works | Major | Jacobs Wash-Leroux Wash |
| LEE LAKE WRF | CA8000100 | CORONA | CA | Publicly owned treatment works | Major | TEMESCAL CREEK, R2 |
| BOISE, CITY OF - WEST BOISE WWTP | ID0023981 | BOISE | ID | Publicly owned treatment works | Major | BOISE RIVER (RIVER MILE 45.1) |
| ARIZONA CITY SANITARY DISTRICT - WWTP | AZ0024244 | ARIZONA CITY | AZ | Publicly owned treatment works | Major | Upper Santa Cruz Wash |
| ASARCO RAY MINE OPERATIONS | AZ0000035 | KEARNY | AZ | Major | Upper Mineral Creek | |
| KING COUNTY WEST POINT WWTP | WA0029181 | SEATTLE | WA | Publicly owned treatment works | Major | Lake Washington-Sammamish River |
| TITANIUM METALS CORPORATION | NV0000060 | HENDERSON | NV | Major | City of Henderson-Las Vegas Wash | |
| MIDDLE EAST FORK WWTP | OH0049387 | BATAVIA | OH | Publicly owned treatment works | Major | East Fork of Little Miami River |
| SHREVEPORT, CITY OF | LAS000401 | SHREVEPORT | LA | Large municipal storm sewer systems | Major | Sand Beach Bayou-Bayou Pierre |
| CLYDE WWTP | OH0024686 | CLYDE | OH | Publicly owned treatment works | Major | Racoon Creek-Frontal Sandusky Bay |
| RED RIVER WWTP | KY0034428 | STANTON | KY | Publicly owned treatment works | Major | RED RIVER |
| REXBURG, CITY OF - REXBURG WWTP | ID0023817 | REXBURG | ID | Publicly owned treatment works | Major | TETON RIVER, REXBURG CANAL |