| 4 R RANCH WATER 2-PLANT 2 - BIG OAK DRIVE | Drinking water | — | — | — | No Violation Identified |
| AERO VALLEY WATER SERVICE-PLANT - 5281 KELLY DR | Drinking water | — | — | — | No Violation Identified |
| AQUARINA UTILITIES-AQUARINA R.O. WTP | Drinking water | — | 1 | — | Violation Identified |
| ARROWHEAD WATER SYSTEM-PLANT - FM 1303 | Drinking water | — | — | — | No Violation Identified |
| BIG WOOD SPRINGS WATER SYSTEM-PLANT | Drinking water | — | — | — | Violation Identified |
| BUENA VISTA LAKES-TREATMENT FACILITY TF080 | Drinking water | — | — | — | No Violation Identified |
| CASSIE WATER SYSTEM-GUITP-PLANT 1 - AGARITA LN | Drinking water | — | 1 | — | Significant Violation |
| CASTLECOMB WATER SYSTEM-PLANT | Drinking water | — | — | — | No Violation Identified |
| CENTER RIDGE WATER DISTRICT #2-COOL WATER WORKS WTP | Drinking water | — | — | — | Violation Identified |
| CENTER RIDGE WATER DISTRICT #3-CENTER RIDGE #3 WTP | Drinking water | — | — | — | Violation Identified |
| CENTER RIDGE WATER DISTRICT #4-L H & M WTP | Drinking water | — | — | — | Violation Identified |
| CENTER RIDGE WATER SYSTEM-CENTER RIDGE WTP | Drinking water | — | — | — | Violation Identified |
| CHAMBERS MEADOW ESTATE WATER-PLANT | Drinking water | — | — | — | No Violation Identified |
| CIRCLE R RANCHETTES-PLANT | Drinking water | — | 1 | — | No Violation Identified |
| CLERMONT HARBOR-TREATMENT FACILITY TF102 | Drinking water | — | — | — | No Violation Identified |
| CONFLUENCE RIVERS M & M MHP WTP-TREATMENT | Drinking water | — | — | — | No Violation Identified |
| COOLEY POINT-PLANT - 6856 BRIAR RD | Drinking water | — | — | — | Inactive |
| COPANO HEIGHTS WATER-LINK PLANT ? | Drinking water | — | — | — | No Violation Identified |
| COUNTRY SQUIRE WATER & SEWER-PLANT 1 - TENNYSON ST | Drinking water | — | — | — | No Violation Identified |
| CRAZY HORSE RANCH WATER-PLANT 1 SOUTH - OAK CIR / FIR ST | Drinking water | — | — | — | Significant Violation |
| CS HARRISBURG UTILITY COMPANY-TP001 - CL2 | Drinking water | — | — | — | Violation Identified |
| CS OAK CREEK PUBLIC SERVICE LLC-TP001 - CL2 | Drinking water | — | — | — | No Violation Identified |
| CS TIERRA MESA ESTATES WATER COMPANY-XTP001 - CL2 | Drinking water | — | 1 | — | No Violation Identified |
| CS WHITE HILLS WATER COMPANY UNITS 3 4 6-XTP001 - CL2 | Drinking water | — | — | — | Violation Identified |
| DANIELDALE COMMUNITY WATER SERVICE-LINK PLANT ? | Drinking water | — | — | — | Violation Identified |
| DEER COUNTRY WSC-PLANT - WOOTAN LN | Drinking water | — | — | — | No Violation Identified |
| DEER SPRINGS WATER COMPANY-PLANT 1 | Drinking water | — | — | — | Significant Violation |
| DES PERES TIRE & AUTO | Air | — | — | — | No Violation Identified |
| DIXIE GARDEN WATER SUPPLY-TREATMENT PLANT | Drinking water | — | — | — | Violation Identified |
| EMERALD FOREST-PLANT - PIONEER / FM 1446 | Drinking water | — | — | — | Violation Identified |
| EMIL-MAR SUBDIVISION-EMIL-MAR WTP | Drinking water | — | 1 | — | Violation Identified |
| ENID SHORES DEV WATER COMPANY-TREATMENT FACILITY TF080 | Drinking water | — | — | — | No Violation Identified |
| FAMILY PARTNERS VILLAS | Water | — | — | — | No Violation Identified |
| FLAG CREEK RANCH-PLANT - FLAG CREEK RANCH RD | Drinking water | — | — | — | Violation Identified |
| FLORIDA HEIGHTS S/D-FLORIDA HEIGHTS WTP | Drinking water | — | 1 | — | Violation Identified |
| FLOYD CLARK SUBDIVISION-HODGES WATER CO-AKA FLOYD CLRK | Drinking water | — | 1 | — | Violation Identified |
| FOUNTAINVIEW SUBDIVISION-PLANT 1 - 5401 FARLEY DR | Drinking water | — | — | — | No Violation Identified |
| FRANKLIN WATER SYSTEMS 3-WELL 2 | Drinking water | — | 1 | — | Significant Violation |
| GLADLO WATER & SEWER INC-WELL #1 TREATMENT | Drinking water | — | 3 | — | No Violation Identified |
| GRANDE CASA-PLANT | Drinking water | — | — | — | No Violation Identified |
| GULF PARK-TREATMENT FACILITY TF104 | Drinking water | — | — | — | No Violation Identified |
| HERITAGE OAKS SUBDIVISION-PLANT | Drinking water | — | — | — | No Violation Identified |
| HICKORY HILL WATER-PLANT - HICKORY HILL DR | Drinking water | — | — | — | Violation Identified |
| HIDE-A-WAY HILLS WATER COMPANY-TREATMENT FACILITY TF101 | Drinking water | — | — | — | No Violation Identified |
| HILLCREST UTILITY OPERATING COMPANY INC-WELL #1 TREATMENT | Drinking water | — | — | — | No Violation Identified |
| HILLS OF BRIAR OAKS-PLANT - S CEDAR DR | Drinking water | — | — | — | Violation Identified |
| HILLSIDE ESTATES WATER SYSTEM-PLANT - HILLSIDE ESTATES WS | Drinking water | — | — | — | Violation Identified |
| HOUSTON ESTATES UTILITY-PALMETTO POINTE-TREATMENT FACILITY TF102 | Drinking water | — | — | — | No Violation Identified |
| HOWARD WATER COOP-PLANT - FM 985 / FM 877 | Drinking water | — | — | — | No Violation Identified |
| LA PLAYA SUBDIVISION WATER SYSTEM-PLANT | Drinking water | — | 2 | — | Violation Identified |
| LAGUNA VISTA SUBDIVISION-PLANT 2 - 117 BONITA DR | Drinking water | — | — | — | No Violation Identified |
| LAKE LIMESTONE COVES WATER SYSTEM-PLANT | Drinking water | — | — | — | Violation Identified |
| LAKESIDE ESTATES WATER SYSTEM-PLANT | Drinking water | — | — | — | No Violation Identified |
| LAKESIDE FOREST 2 (SC3250030)-PLANT ONE | Drinking water | — | — | — | No Violation Identified |
| LAKEVIEW WATER SYSTEM-PLANT | Drinking water | — | — | — | No Violation Identified |
| LAKEWOOD ENVIRONMENTAL-TREATMENT FACILITY TF102 | Drinking water | — | — | — | No Violation Identified |
| LANDFAIR SUBDIVISION-LANDFAIR WTP | Drinking water | — | — | — | No Violation Identified |
| LIMESTONE UTILITY-WATER PLANT | Drinking water | — | — | — | Significant Violation |
| LONGFORD PLACE WATER SYSTEM-PLANT - STRATFORD DR | Drinking water | — | — | — | No Violation Identified |
| MACYS WEST COUNTY #652 | Hazardous waste | — | — | — | No Violation Identified |
| MAGNOLIA - BARRON RIDGE SUBDIVISION-MAIN PLANT - CHLORINE | Drinking water | 1 | — | — | No Violation Identified |
| MAGNOLIA - BIG OAKS-MAIN PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA - COLWORTH PLACE-MAIN PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA - DENNY DRIVE-MAIN PLANT DENNY DRIVE | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA - LINDA LANE-MAIN PLANT | Drinking water | — | — | — | Violation Identified |
| MAGNOLIA - MEADOWWOOD ESTATES-MAIN PLANT MEADOWWOOD DR | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA - SANDSTONE LAKE-TREATMENT PLANT - WELL 002 | Drinking water | — | — | — | Violation Identified |
| MAGNOLIA WATER UTILITES - CHERRYWOOD-TREATMENT PLANT AT WELL | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-BEAU PRE-TREATMENT PLANT #1 | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-BELLEVILLE SUBDIVISION-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-BEVERLY HEIGHTS-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-BRIER LAKE UTILITIES INC-TREATMENT PLANT @ WELL 1 | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-CARENCRO VILLAGE-TREATMENT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-COTTAGES OF ACADIANA-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-EVANGELINE OAKS-SOUTH OLD PLANT SITE | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-GARDEN HEIGHTS SUBDIVISION WS-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-GRANDE PALMS-TREATMENT PLANT #1 | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-GUSTE ISLAND-GUSTE ISLAND WATER SUPPLY | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-HABERSHAM SUBDIVISION-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-HIGHLAND RIDGE-WELL 001 TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-HOMELAND HEIGHT-TREATMENT PLANT | Drinking water | 1 | — | — | No Violation Identified |
| MAGNOLIA-I59 MHP-RED- OAK MHP TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-JACKSON SQUARE-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-JONES ROLLING RIDGE-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-LAKESHORE ESTATES-TREATMENT PLANT #1 | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-LE TRIOMPHE SUBDIVISION-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-LEXINGTON HEIGHTS-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-MONEY HILLS ESTATES-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-PENN MILL LAKES-PENN MILL LAKES TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-PENN MILL PLACE-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-PILOT STREET-TREATMENT PLANT | Drinking water | — | — | — | Violation Identified |
| MAGNOLIA-PINNACLE PLACE SUBDIVISION-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-PORT EAST-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-PORT LOUIS TOWNHOMES-TREATMENT PLANT FOR WELL #1 | Drinking water | — | — | — | Violation Identified |
| MAGNOLIA-RIGOLETS ESTATES-TREATMENT PLANT #1 | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-RIVER PARK-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-RIVER PINES PLANTATION-WELL 2 TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-SHENANDOAH ESTATES-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-SOUTHFIELD SQUARE-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-SPRING CREEK SUBDIVISION-TREATMENT PLANT - WELL #1 | Drinking water | — | 1 | — | Violation Identified |
| MAGNOLIA-UTILITY SERVICE OF LAKE CHARLES-TP FOR WELL #1, #2 | Drinking water | — | 1 | — | No Violation Identified |
| MAGNOLIA-VILLAGE QUEST SUBDIVISION-TREATMENT PLANT | Drinking water | — | — | — | No Violation Identified |
| MAGNOLIA-WILDWOOD SOUTH-REMOTE WELL NO 2 PLANT | Drinking water | — | — | — | No Violation Identified |
| MEADOWVIEW ESTATES II-PLANT - 1922 ANGEL COVE LN | Drinking water | — | — | — | No Violation Identified |
| MEADOWVIEW ESTATES-PLANT - 2105 LAUREN LN | Drinking water | — | — | — | No Violation Identified |
| NORTH UNIVERSITY ESTATES-PLANT 2 - 9801 N FM 1264 | Drinking water | — | — | — | Violation Identified |
| NORTH VICTORIA UTILITIES-PLANT - 152 LONGVIEW DR | Drinking water | — | — | — | No Violation Identified |
| OAK HILL ESTATES-PLANT - 21647 LEE RD | Drinking water | — | — | — | Violation Identified |
| OAK HILLS RANCH WATER-PLANT - OAK HILL RANCH | Drinking water | — | — | — | No Violation Identified |
| OCEAN BEACH-TREATMENT FACILITY TF104 | Drinking water | — | — | — | No Violation Identified |
| PALMER CREEK UTILITY ASSC, INC-TREATMENT FACILITY TF101 | Drinking water | — | — | — | No Violation Identified |
| PARKS UTILITIES-TREATMENT FACILITY TF101 | Drinking water | — | — | — | No Violation Identified |
| PARKVIEW WATER SUPPLY-MITCHELL ST IN PARKVIEW SUBDIVISION | Drinking water | — | — | — | Violation Identified |
| PASS CHRISTIAN ISLES-TREATMENT FACILITY TF101 | Drinking water | — | — | — | No Violation Identified |
| PONDEROSA PINES (2 WPS)-PONDEROSA PINES WTP #2 | Drinking water | — | — | — | Violation Identified |
| PORT PERRY SERVICE-TREATMENT WELL #1 | Drinking water | — | — | — | No Violation Identified |
| QUIET VILLAGE II-LINK PLANT ? | Drinking water | — | — | — | No Violation Identified |
| RED OAK COMMUNITY WATER SERVICE-PLANT - 105 CARSON ST | Drinking water | — | — | — | Violation Identified |
| ROBINWOOD FOREST UTILITY INC-TREATMENT FACILITY TF102 | Drinking water | — | — | — | No Violation Identified |
| ROCKY POINT COMMUNITY-PLANT - 1216 POINT ST | Drinking water | — | — | — | No Violation Identified |
| ROUSES-TREATMENT FACILITY TF102 | Drinking water | — | — | — | No Violation Identified |
| SAN PEDRO VILLAGE-PLANT 1 | Drinking water | — | — | — | No Violation Identified |
| SANDY ACRES-LINADALE WATER/SANDY ACRES WTP | Drinking water | — | — | — | Violation Identified |
| SETTLERS CROSSING WATER SYSTEM 2-PLANT - | Drinking water | — | — | — | No Violation Identified |
| SETTLERS ESTATES SEC II-PLANT - 2543 SETTLERS WAY | Drinking water | — | — | — | No Violation Identified |
| SHADY OAKS WATER-PLANT - SHADY OAKS DR | Drinking water | — | — | — | No Violation Identified |
| SOUTH COUNCIL CREEK 2-PLANT - CR 137 / KING PLAZA | Drinking water | — | 1 | — | Violation Identified |
| SPANISH GRANT SUBDIVISION-PLANT - 5478 FM 1446 | Drinking water | — | — | — | Violation Identified |
| ST. PAUL'S SCHOOL | Water | — | — | — | No Violation Identified |
| TEXAS LANDING UTILITIES GOODE CITY-PLANT | Drinking water | — | — | — | No Violation Identified |
| TEXAS LANDING UTILITIES-PLANT - 600 BURCHFIELD DR | Drinking water | — | 3 | — | Violation Identified |
| THE HIGHLANDS-TREATMENT FACILITY TF081 | Drinking water | — | — | — | Violation Identified |
| THE WILLOWS UTILITY COMPANY-WELL # 1 | Drinking water | — | — | — | No Violation Identified |
| THE WOODLANDS WATER SYSTEM-PLANT | Drinking water | — | — | — | No Violation Identified |
| THE WOODS-TREATMENT FACILITY TF101 | Drinking water | — | — | — | No Violation Identified |
| THOUSAND OAKS SUBDIVISION-PLANT - 2011 CR 279 | Drinking water | — | — | — | Violation Identified |
| TRADEWINDS VILLAGE-TRADEWINDS VILLAGE | Drinking water | — | — | — | Violation Identified |
| TREETOP ESTATES-PLANT - 114 VISTA RIDGE CT | Drinking water | — | — | — | No Violation Identified |
| TRI COUNTY POINT WATER SYSTEM 2-PLANT | Drinking water | — | — | — | Violation Identified |
| TRI COUNTY POINT WATER SYSTEM 3-PLANT | Drinking water | — | — | — | No Violation Identified |
| TRI COUNTY POINT WATER SYSTEM 4-PLANT | Drinking water | — | — | — | Significant Violation |
| VACATION VILLAGE-PLANT - 2772 LAKE VISTA LN | Drinking water | — | — | — | No Violation Identified |
| VILLE DALSACE WATER SUPPLY-PLANT - 2433 CR 4516 | Drinking water | — | — | — | Violation Identified |
| VINEYARD RIDGE WATER SUPPLY-PLANT - AXIS CIR | Drinking water | — | — | — | No Violation Identified |
| WALGREENS #5120 | Hazardous waste | — | — | — | No Violation Identified |
| WALNUT BEND WATER SYSTEM-0000177 - PLANT | Drinking water | — | — | — | Inactive |
| WATER WORKS 1 FLOYD ACRES-PLANT 1 | Drinking water | — | — | — | Violation Identified |
| WATER WORKS 2 ISLAND LODGES-OLD GUI PLANT | Drinking water | — | — | — | No Violation Identified |
| WHITE CYPRESS LAKES-TREATMENT FACILITY TF101 | Drinking water | — | — | — | No Violation Identified |
| WOOD TRAIL WATER SUPPLY-PLANT | Drinking water | — | — | — | No Violation Identified |
| WOODLAND HARBOR-PLANT - CR 2121 / PR 50230 | Drinking water | — | — | — | Violation Identified |
| WOODLANDS WEST-PLANT - 101 OAK RIDGE DR | Drinking water | — | — | — | No Violation Identified |
| WOOLMARKET VILLAGE ESTATES-TREATMENT FACILITY TF102 | Drinking water | — | — | — | No Violation Identified |