County · Montana

Yellowstone County, Montana: drinking water records

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

Explore EPA records for 54 community water systems across 12 ZIP codes in Yellowstone County, then find water-testing resources and available recent monitoring-station readings.

In focus54Community 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 5 of the 54 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 54 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	Health-based violations	Lead, 9 in 10 homes at or below
Laurel Municipal Water System MT0000270	6,339	120	1	2 ppbbelow the action level
Billings City of MT0000153	114,000	120	0	5 ppbbelow the action level
Billings Heights Co Water Dist of MT0000155	12,000	60	0	5 ppbbelow the action level
Lockwood Water and Sewer District MT0000156	5,900	120	0	3 ppbbelow the action level
Worden Ballantine Yellowstone MT0000022	800	0	8	3 ppbbelow the action level
Granite Park Water Association MT0004563	250	0	1	2 ppbbelow the action level
Huntley Yellowstone Co Water and Sewer MT0000254	230	0	1	2 ppbbelow the action level
Crystal Springs Water System MT0003986	225	0	9	4 ppbbelow the action level
Still River Estates Subdivision MT0005118	188	0	1	2 ppbbelow the action level
Golden Eagle Water Users Assn MT0002840	125	0	1	2 ppbbelow the action level
Arrow Creek Trailer Court MT0004507	75	0	5	4 ppbbelow the action level
Black Rock Estates Subdivision MT0004881	75	60	0	2 ppbbelow the action level
Duck Creek Mobile Home Park MT0001786	70	0	3	7 ppbbelow the action level
Pioneer Water Service MT0004226	900	0	0	2 ppbbelow the action level
Estates at Yellowstone LLC MT0000464	800	0	0	3 ppbbelow the action level
Golden Meadows Subdivision MT0005141	772	0	0	4 ppbbelow the action level
Fisher Water Service MT0001848	750	0	0	0 ppbbelow the action level
Hillside Village MT0003808	650	0	0	1 ppbbelow the action level
Cherry Creek Estates LLC MT0004392	600	0	0	2 ppbbelow the action level
Windsor Estates MT0003807	530	0	0	1 ppbbelow the action level
Pryor Creek Water Assn MT0002956	475	0	0	1 ppbbelow the action level
Stone Creek Subdivision MT0005183	378	0	0	4 ppbbelow the action level
Sundance Subdivision MT0005056	378	0	0	0 ppbbelow the action level
Hidden Lake Yellowstone County W and S D MT0003374	350	0	0	0 ppbbelow the action level
Emerald View Park MT0002996	320	0	0	0 ppbbelow the action level
Shiloh Road Development MT0005178	315	0	0	0 ppbbelow the action level
Precision Water MT0004497	250	0	0	0 ppbbelow the action level
Golden Meadows Subdivision 2nd Cc MT0005186	245	0	0	2 ppbbelow the action level
Wells Garden Estates MT0002927	240	0	0	0 ppbbelow the action level
Yellowstone Boys and Girls Ranch MT0000154	240	0	0	1 ppbbelow the action level
Skycrest Estates Subdivision MT0004964	235	0	0	0 ppbbelow the action level
The Nines Subdivision MT0004989	220	0	0	2 ppbbelow the action level
Broadview Town of MT0000167	200	0	0	11 ppbbelow the action level
Go 2 U Water Delivery MT0004754	200	0	0	0 ppbbelow the action level
Oak Ridge Estates MT0004250	200	0	0	5 ppbbelow the action level
Sunhaven Mobile Home Park MT0004147	160	0	0	2 ppbbelow the action level
Saddleback Ridge Estates MT0004408	150	0	0	0 ppbbelow the action level
C & C Community INC MT0005017	145	0	0	0 ppbbelow the action level
Eastwood Mobile Home Court MT0005147	140	0	0	0 ppbbelow the action level
Mountain View Colony MT0004058	114	0	0	0 ppbbelow the action level
Aldinger Acres Subdivision MT0003552	100	0	0	0 ppbbelow the action level
Erics Emergency Water Service MT0006002	100	0	0	0 ppbbelow the action level
River Grove Estates Tr Ct MT0000123	100	0	0	13 ppbbelow the action level
Shepherd Water Station MT0004920	100	0	0	0 ppbbelow the action level
Peks Mobile Home Court MT0004714	95	0	0	2 ppbbelow the action level
Mitchell Court Apartments MT0005190	80	0	0	0 ppbbelow the action level
Midway Townhomes Wua MT0005065	75	0	0	0 ppbbelow the action level
Blue Grass Water Users Association MT0004093	60	0	0	2 ppbbelow the action level
Fox Water Service Incorporated MT0002895	60	0	0	0 ppbbelow the action level
Double Diamond Subdivision Arbor Hills MT0004845	50	0	0	1 ppbbelow the action level
Sartorie Legacy Homes MT0005129	35	0	0	0 ppbbelow the action level
Mccann'S Water Service LLC MT0004705	25	0	0	0 ppbbelow the action level
Ridgeview Subdivision Phase One MT0005232	60	0	0	not reported
Silver Creek Condominiums in Yellowstone MT0005222	28	0	0	not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in Yellowstone County, Montana. 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 Yellowstone County

12ZIP 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

Acton
Ballantine
Billings
Broadview
Custer
Huntley
Laurel
Lockwood
Shepherd
Worden

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

59002Acton
59006Ballantine
59015Broadview
59024Custer
59037Huntley
59044Laurel
59079Shepherd
59088Worden
59101Lockwood
59102Billings
59105Billings
59106Billings

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.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s PFAS survey records.LeadChoosing a lead filter13 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 Yellowstone County

All Montana 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.