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Franklin County, Missouri — public water systems

At a glance

81 active public water systems are filed under Franklin County, Missouri in EPA's SDWIS records, together reporting 70,978 people served. The largest is Washington Pws, which reports serving 14,068 people. 41 are community water systems serving people where they live; the other 40 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

81

Population served

71K

Community systems

41

Groundwater share

100%

How does Franklin County compare with other Missouri counties?

Franklin County has the 8th-most active public water systems among the 182 counties listed for active Missouri systems in EPA records; among the 132 with 3 or more systems, the median has 13. Its systems report 70,978 people served in total, the 15th-largest county figure in the state and 1.2% of the statewide total. The average system here reports serving 876 people, about 57% below the Missouri average of 2,049. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Franklin County's drinking water come from?

By primary water source, Franklin County's active systems draw on groundwater (81, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 92% and 8.1% across Missouri. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Washington Pws, draws primarily on groundwater.

What kinds of water systems operate in Franklin County?

Franklin County's active systems break down as 41 community systems (51%), 12 non-transient non-community systems (15%) and 28 transient non-community systems (35%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (64%), local government (28%) and state government (7.4%).

The 50 largest water systems in Franklin County

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Active public water systems in Franklin County, Missouri
#Water systemCountyPopulation servedTypeSource
1Washington PwsFranklin14,068CommunityGroundwater
2Union PwsFranklin12,348CommunityGroundwater
3Franklin County Pwsd 3Franklin8,250CommunityGroundwater
4Sullivan PwsFranklin + 1 more7,081CommunityGroundwater
5Pacific PwsFranklin + 1 more6,000CommunityGroundwater
6St Clair PwsFranklin4,700CommunityGroundwater
7Franklin County Pwsd 1Franklin3,500CommunityGroundwater
8New Haven PwsFranklin2,000CommunityGroundwater
9Gerald PwsFranklin1,383CommunityGroundwater
10Franklin County Pwsd 3 St AlbansFranklin1,300CommunityGroundwater
11Franklin County Pwsd 4Franklin760CommunityGroundwater
12Franklin County Pwsd 3 Lake SereneFranklin600CommunityGroundwater
13Oak Grove Village PwsFranklin508CommunityGroundwater
14Wagners StoreFranklin500Transient non-communityGroundwater
15Coleman Elementary SchoolFranklin485Non-transient non-communityGroundwater
16Lonedell R Xiv Elementary SchoolFranklin385Non-transient non-communityGroundwater
17Argyle Estates Water SupplyFranklin380CommunityGroundwater
18Franklin County Water Company Inc.Franklin350CommunityGroundwater
19Nike Elementary SchoolFranklin300Non-transient non-communityGroundwater
20Silver OaksFranklin300Transient non-communityGroundwater
21Meramec CavernsFranklin273Transient non-communityGroundwater
22Berger PwsFranklin256CommunityGroundwater
23Village GreensFranklin250CommunityGroundwater
24Sylvan Manor SubdFranklin240CommunityGroundwater
25Franklin County Pwsd 5Franklin230CommunityGroundwater
26Spring Bluff R Xv Elementary SchoolFranklin220Non-transient non-communityGroundwater
27Camp Mo ValFranklin200Transient non-communityGroundwater
28Robertsville Elementary SchoolFranklin190Non-transient non-communityGroundwater
29Miramiguoa ParkFranklin150CommunityGroundwater
30Franklin County R Ii Elementary SchoolFranklin150Non-transient non-communityGroundwater
31Crestview Acres SubdFranklin150CommunityGroundwater
32Evergreen Lake EstatesFranklin150CommunityGroundwater
33Cedar Vale MHPFranklin142CommunityGroundwater
34Meramec State Park CampgrdFranklin138Transient non-communityGroundwater
35Spring Meadows MHPFranklin135CommunityGroundwater
36Purina Animal Nutrition CenterFranklin125Non-transient non-communityGroundwater
37Bourbeuse MHPFranklin125CommunityGroundwater
38Sirenity Farms CampgroundFranklin120Transient non-communityGroundwater
39Tall Oaks MHPFranklin120CommunityGroundwater
40Campbellton Elementary SchoolFranklin120Non-transient non-communityGroundwater
41Franklin County Special School DistFranklin111Non-transient non-communityGroundwater
42Woodland Hills SubdFranklin110CommunityGroundwater
43Holtgrewe Farms SubdivisionFranklin110CommunityGroundwater
44Triple 3 Vineyard Winery and Event CntrFranklin100Transient non-communityGroundwater
45Cedar Creek Conference CenterFranklin100Transient non-communityGroundwater
46Forty Acre ClubFranklin100Non-transient non-communityGroundwater
47Meramec State Park Dining LodgeFranklin100Transient non-communityGroundwater
48Paradise MHPFranklin98CommunityGroundwater
49St Joseph Catholic Church of NeierFranklin95Transient non-communityGroundwater
50Bright Beginnings Day CareFranklin80Non-transient non-communityGroundwater

All other water systems in Franklin County (31)

The remaining active systems filed under Franklin County, largest first, with the population each reports serving.

Franklin County water systems: frequently asked questions

How many public water systems are in Franklin County, Missouri?

EPA's SDWIS records file 81 active public water systems under Franklin County, Missouri: 41 community systems (51%), 12 non-transient non-community systems (15%) and 28 transient non-community systems (35%).

Who supplies drinking water in Franklin County, MO?

The largest community water systems filed under Franklin County are Washington Pws (14,068 people served), Union Pws (12,348 people served) and Franklin County Pwsd 3 (8,250 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Franklin County's drinking water come from groundwater or surface water?

Of the 81 active public water systems in Franklin County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Washington Pws, uses groundwater.

Where can I find a water quality report for Franklin County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 41 community systems are filed under Franklin County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Franklin County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Missouri water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Franklin County, Missouri”, https://aquacensus.com/water-systems/missouri/franklin (data as of October 1, 2026).