County · Colorado

Jefferson County, Colorado: drinking water records

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

Explore EPA records for 47 community water systems across 27 ZIP codes in Jefferson County, then find water-testing resources and available recent monitoring-station readings.

In focus47Community 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 8 of the 47 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 47 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
Golden Terrace West CO0130319	825	120	0	1	0 ppbbelow the action level
Arvada City of CO0130001	171,610	240	0	0	3.1 ppbbelow the action level
Consolidated Mutual Maple Grove CO0130020	81,400	120	3	0	2 ppbbelow the action level
Green Mountain WSD CO0130321	49,400	0	0	1	9 ppbbelow the action level
Golden City of CO0130040	38,288	120	0	0	0 ppbbelow the action level
Wheat Ridge Water District CO0130842	20,000	0	0	1	9 ppbbelow the action level
Evergreen Md CO0130030	15,750	120	0	0	6 ppbbelow the action level
North Table Mountain WSD CO0130105	10,000	120	0	0	1.3 ppbbelow the action level
Morrison Town of CO0130085	9,887	120	2	0	2.7 ppbbelow the action level
Genesee WSD CO0130035	3,920	120	0	0	2 ppbbelow the action level
South Sheridan Water and Sewer Dist CO0130718	2,500	0	0	1	9 ppbbelow the action level
Mountain WSD CO0130100	1,941	0	0	3	4 ppbbelow the action level
Indian Hills WD CO0130065	1,300	0	0	6	1 ppbbelow the action level
Homestead Wc CO0130050	1,000	0	0	17	1 ppbbelow the action level
North Lincoln WSD CO0116552	1,000	0	0	1	9 ppbbelow the action level
Mt Vernon Country Club CO0130090	734	0	0	7	3 ppbbelow the action level
Golden Terrace Village CO0130317	580	0	0	1	0 ppbbelow the action level
Mountainside Estates MHP CO0130517	473	0	0	1	0 ppbbelow the action level
Golden Terrace South CO0130318	425	0	0	1	0 ppbbelow the action level
Idledale WSD CO0130055	350	0	0	1	0 ppbbelow the action level
Hidden Valley Water District CO0130045	155	0	0	3	3.5 ppbbelow the action level
Buffalo Creek WD CO0130015	125	0	0	3	3 ppbbelow the action level
Cragmont Wc CO0130187	50	0	0	4	0.5 ppbbelow the action level
Bancroft Clover WSD CO0130133	44,000	0	0	0	9 ppbbelow the action level
Bear Creek WSD CO0130138	30,000	0	0	0	9 ppbbelow the action level
Lakehurst WSD CO0130466	12,000	0	0	0	9 ppbbelow the action level
Valley WD CO0130800	10,000	0	0	0	9 ppbbelow the action level
Willowbrook WSD CO0130843	9,348	0	0	0	9 ppbbelow the action level
Lakewood City of CO0130467	6,000	0	0	0	9 ppbbelow the action level
Edgewater City of CO0130237	5,300	0	0	0	2.6 ppbbelow the action level
High View WD CO0130344	4,000	0	0	0	9 ppbbelow the action level
Meadowbrook WD CO0130500	3,290	0	0	0	9 ppbbelow the action level
Alameda WSD CO0130116	2,480	0	0	0	9 ppbbelow the action level
Ralston Valley WSD CO0130667	1,610	0	0	0	1.5 ppbbelow the action level
Brook Forest WD CO0130010	998	0	0	0	2 ppbbelow the action level
Sheridan MHP CO0130125	480	0	0	0	0 ppbbelow the action level
Forest Hills Md Riva Chase CO0130033	400	0	0	0	3.5 ppbbelow the action level
Blue Mountain WD CO0130005	350	0	0	0	0 ppbbelow the action level
Bonvue Water and Sanitation District CO0130152	350	0	0	0	9 ppbbelow the action level
Elevado Estates LLC CO0130025	250	0	0	0	1.5 ppbbelow the action level
Inspiration Valley MHP CO0130070	250	0	0	0	0 ppbbelow the action level
Majestic MHP CO0130501	232	0	0	0	2 ppbbelow the action level
Ridgewood Mobile Home Park CO0130676	196	0	0	0	0 ppbbelow the action level
Ken Caryl West Ranch WD CO0130075	140	0	0	0	7 ppbbelow the action level
Pleasant View Estates CO0130604	122	0	0	0	0 ppbbelow the action level
Park Wc Wonderview CO0130115	90	0	0	0	0.5 ppbbelow the action level
Ken Caryl WSD CO0103075	12,000	0	0	0	not reported

USGS · Monitoring stations

The water, more recently.

Available station readings in Jefferson County, Colorado. 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

27ZIP 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

Arvada
Aspen Park
Coal Creek
Columbine
Dakota Ridge
Denver
Golden
Idledale
Indian Hills
Kittredge
Lakewood
Westminster
Wheat Ridge

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

80002Arvada
80003Arvada
80004Arvada
80005Arvada
80007Arvada
80021Westminster
80033Wheat Ridge
80123Denver
80127Dakota Ridge
80128Columbine
80214Lakewood
80215Lakewood
80226Lakewood
80227Lakewood
80228Lakewood
80232Lakewood
80235Denver
80401Golden
80403Coal Creek
80419Golden
80425
80433Aspen Park
80453Idledale
80454Indian Hills
80457Kittredge
80465Dakota Ridge
80470

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 2 of the 8 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter9 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 Colorado 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.