St. Charles County, Missouri Water Systems

St. Charles County, Missouri

51 community water systems on record — 19 active, 32 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.

Community water systems in St. Charles County, Missouri

System name	City	Population served	Status
BELLEAU GARDENS TRAILER COURT	O'FALLON	75	Inactive
BIG COUNTRY ACRES SUBDIVISION	FORISTELL	90	Active
CASTLEGATE ESTATES MHP	WEBSTER GROVES	360	Inactive
CHEROKEE LAKES/EL MAU SUBD	WENTZVILLE	100	Inactive
CHESHIRE SUBD	ST CHARLES	95	Inactive
CONFLUENCE RIVERS STONE RIDGE MEADOWS	DES PERES	60	Active
COUNTRY ESTATES	FORISTELL	50	Active
ECM WATER & SEWER AUTHORITY - FLINT HILL	O'FALLON	469	Active
FIELDCREST SUBD	ST CHARLES	420	Inactive
FLO ANN SUBD	ST. CHARLES	25	Inactive
FOREST HILL SUBD	FORISTELL	65	Inactive
KING ARTHURS COURT	O FALLON	165	Inactive
LACLEDE MHP	CHESTERFIELD	25	Inactive
LAKE CHARLES HILLS SUBD	O'FALLON	800	Inactive
MARTELL RIDGE	O'FALLON	97	Inactive
MISSOURI CITIES-BELLEAU LAKE	ST CHARLES	220	Inactive
MISSOURI CITIES-WARSON HILLS	ST. PETERS	430	Inactive
MO AMERICAN JAXSON	COTTLEVILLE	535	Active
MO AMERICAN ST CHARLES	COTTLEVILLE	73,000	Inactive
MO AMERICAN ST LOUIS ST CHARLES COUNTIES	CHESTERFIELD	1,111,000	Active
NEW HOWELL MHP	FORISTELL	60	Inactive
OFALLON PWS	O FALLON	32,515	Active
ORCHARD FARM TOWNHOMES	BALLWIN	25	Inactive
PORTAGE DES SIOUX PWS	PORTAGE DES SIOUX	345	Active
PRAIRIE VIEW ACRES SUBD	WENTZVILLE	135	Active
ROLLING MEADOWS MHP	O'FALLON	900	Inactive
ROYAL OAKS SUBDIVISION	ST LOUIS	40	Inactive
ST CHARLES CO PWSD #1	NEW MELLE	1,850	Inactive
ST CHARLES CO PWSD 2 - SUMAC RIDGE	O'FALLON	103	Active
ST CHARLES CO PWSD 2 AUGUSTA	O'FALLON	881	Active
ST CHARLES CO. PWSD #2- NOR	O'FALLON	13,400	Inactive
ST CHARLES COUNTY PWSD 2	O'FALLON	100,587	Active
ST CHARLES COUNTY WATER DEPT	ST CHARLES	25	Inactive
ST CHARLES PWS	ST CHARLES	73,040	Active
ST CHARLES PWSD 2 FORISTELL	O'FALLON	550	Active
ST CHARLES-ELM POINT PLANT	ST CHARLES	25	Inactive
ST CHARLES-MO RIVER PLT	ST CHARLES	25	Inactive
ST JUDES SUBDIVISION	ST PETERS	8	Inactive
ST MARYS INSTITUTE	O'FALLON	150	Inactive
ST PAUL PWS	O'FALLON	1,700	Active
ST PETERS PWS	ST PETERS	52,575	Active
SUNSHINE HOME CARE	ST LOUIS	36	Inactive
TARA OAKS MANOR ASSN	ST PAUL	100	Active
TEE KAY MOBILE MANOR	FLORISSANT	400	Inactive
TIMBERCREST SUBD	ST. CHARLES	36	Inactive
TIMBERLAINE TRAILS SUBD	O'FALLON	200	Inactive
TWIN ISLAND ESTATES MHP	LAKE ST. LOUIS	50	Inactive
VANGUARD MHP	ST CHARLES	150	Inactive
WELDON SPRING HEIGHTS VILLAGE PWS	WELDON SPRING	100	Active
WENTZVILLE PWS	WENTZVILLE	41,784	Active
WIMER BOARDING HOME	ST CHARLES	35	Inactive