County · Missouri

Jefferson County, Missouri: drinking water records

Name: Drinking water records for Jefferson County, Missouri
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 68 community water systems across 16 ZIP codes in Jefferson County, then find water-testing resources and available recent monitoring-station readings.

In focus68Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 14 of the 68 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 68 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
Crystal City PWS MO6010198	4,733	120	1	3	0 ppbbelow the action level
Jefferson Co Cons Pwsd C 1 MO6024295	37,000	120	0	0	0 ppbbelow the action level
Jefferson County Pwsd 1 MO6024292	21,113	120	0	0	7.3 ppbbelow the action level
Jefferson County Pwsd 3 MO6024294	17,000	120	0	0	0 ppbbelow the action level
Jefferson County Pwsd 2 MO6024293	16,548	180	0	0	0 ppbbelow the action level
Festus PWS MO6010276	13,000	120	1	0	0 ppbbelow the action level
Jefferson County Pwsd 10 MO6024302	10,000	120	0	0	3.9 ppbbelow the action level
Jefferson County Pwsd 5 MO6024296	8,000	300	0	0	1.1 ppbbelow the action level
Jefferson County Pwsd 6 MO6024298	7,500	300	1	0	2.9 ppbbelow the action level
Desoto PWS MO6010213	6,400	120	0	0	1.5 ppbbelow the action level
Jefferson County Pwsd 7 MO6024299	6,100	300	0	0	3.9 ppbbelow the action level
Pevely PWS MO6010638	5,600	240	0	0	2.2 ppbbelow the action level
Herculaneum PWS MO6010359	5,000	240	1	0	1.4 ppbbelow the action level
Jefferson Co Pwsd 8 MO6024300	4,733	180	0	0	2.5 ppbbelow the action level
Hillsboro PWS MO6010368	3,000	0	0	1	4.3 ppbbelow the action level
Jcpsd Summer Set MO6036031	1,080	0	0	1	1.6 ppbbelow the action level
Antire Valley Subd MO6036274	260	0	0	2	0 ppbbelow the action level
Palisades Village MO6036316	142	0	0	1	4.4 ppbbelow the action level
Frontier Estates MO6036101	120	0	0	1	5.0 ppbbelow the action level
Weber Hill MHP MO6048200	80	0	0	3	0.5 ppbbelow the action level
Cedar Hill Lakes Village MO6010970	65	0	0	2	2.6 ppbbelow the action level
Paradise Estates MHP MO6048094	58	0	0	1	3.4 ppbbelow the action level
Ficken Hill Subd MO6036042	25	0	0	2	1.0 ppbbelow the action level
Jefferson County Pwsd 12 MO6024304	3,300	0	0	0	3.2 ppbbelow the action level
Raintree Plantation MO6036271	2,200	0	0	0	1.5 ppbbelow the action level
Mirasol Subdivision MO6031523	2,012	0	0	0	1.9 ppbbelow the action level
Valle Lake Subd MO6036083	625	0	0	0	2.5 ppbbelow the action level
Sugar Creek Estates MHP MO6046277	500	0	0	0	0 ppbbelow the action level
Cedar Hill Estates Water MO6048252	490	0	0	0	0 ppbbelow the action level
Sycamore Springs MO6048401	470	0	0	0	0 ppbbelow the action level
Lakewood Hills Subd MO6036049	400	0	0	0	2.1 ppbbelow the action level
Sunrise Lakes Subd MO6036080	400	0	0	0	1.2 ppbbelow the action level
Lake Adelle Subd MO6036077	380	0	0	0	0.7 ppbbelow the action level
Quail Run of Imperial MO6048258	370	0	0	0	0 ppbbelow the action level
Starling MHP MO6046374	342	0	0	0	5.2 ppbbelow the action level
Jeffco MHP MO6041645	310	0	0	0	0 ppbbelow the action level
Greenfield Manor MHP MO6041646	307	0	0	0	0 ppbbelow the action level
Seven Spring Sewer & Water LLC MO6036053	300	0	0	0	7.7 ppbbelow the action level
Hunters Glen MO6031362	240	0	0	0	1.7 ppbbelow the action level
Lake Lorraine Water Co MO6036028	230	0	0	0	10.9 ppbbelow the action level
Ozark Hills MHP MO6046375	230	0	0	0	1.3 ppbbelow the action level
Briarwood Utilities MO6031110	210	0	0	0	7.7 ppbbelow the action level
Mackenzie Ridge LLC MO6048148	180	0	0	0	4.7 ppbbelow the action level
High Ridge Manor Subd MO6036060	175	0	0	0	0.7 ppbbelow the action level
Fairways Water and Sewer Assn MO6036161	150	0	0	0	1.6 ppbbelow the action level
Lakeside Manor MO6048073	150	0	0	0	0 ppbbelow the action level
Laurel Acres MHP MO6048147	124	0	0	0	0 ppbbelow the action level
Scotsdale Subd MO6036062	120	0	0	0	3.4 ppbbelow the action level
Manderly MHP MO6048616	100	0	0	0	0.6 ppbbelow the action level
Ware Lake Subd MO6036148	100	0	0	0	7.1 ppbbelow the action level
Baisch Nursing Center MO6069045	80	0	0	0	0 ppbbelow the action level
South Shore Water Assn MO6030528	75	0	0	0	2 ppbbelow the action level
Fennec Fox Way LLC MO6036061	70	0	0	0	3.8 ppbbelow the action level
Lakehurst MHP MO6048040	70	0	0	0	0 ppbbelow the action level
Liberty Utilities Warren Woods Subd MO6036084	60	0	0	0	0 ppbbelow the action level
Block Six Water Assn MO6036207	50	0	0	0	0 ppbbelow the action level
Sycamore Green Acres MHP MO6048052	50	0	0	0	1.9 ppbbelow the action level
House Springs Apt MO6079508	48	0	0	0	1.5 ppbbelow the action level
Leonards MHP MO6048100	48	0	0	0	10.6 ppbbelow the action level
Meadow Drive Subd MO6036081	42	0	0	0	0 ppbbelow the action level
Crystal Cove MHP MO6048142	40	0	0	0	3.0 ppbbelow the action level
Pine Ford Village MHP MO6048354	40	0	0	0	0 ppbbelow the action level
Country Aire Estates MO6048048	30	0	0	0	1.8 ppbbelow the action level
Walker Hill MHP MO6041184	30	0	0	0	1.4 ppbbelow the action level
Lynn Acres MHP MO6046381	27	0	0	0	0 ppbbelow the action level
Valle Acres MHP MO6048208	11	0	0	0	0 ppbbelow the action level
Jefferson County Water Authority MO6071352	25	0	0	0	not reported
Villas at Fox Run MO6031500	25	0	0	0	not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in Jefferson County, Missouri. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Jefferson County

16ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Arnold
Barnhart
Crystal City
De Soto
Fenton
Festus
Herculaneum
High Ridge
Hillsboro
Imperial
Kimmswick
LaBarque Creek
Pevely

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

63010Arnold
63012Barnhart
63016LaBarque Creek
63019Crystal City
63020De Soto
63023
63026Fenton
63028Festus
63047
63048Herculaneum
63049High Ridge
63050Hillsboro
63051LaBarque Creek
63052Imperial
63053Kimmswick
63070Pevely

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 4 of the 14 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter7 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Jefferson County

All Missouri counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.