County · Colorado
Arapahoe County, Colorado: drinking water records
Explore EPA records for 30 community water systems across 17 ZIP codes in Arapahoe County, then find water-testing resources and available recent monitoring-station readings.
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 30 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
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 30 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 |
|---|---|---|---|---|---|
| Englewood City of CO0103045 | 57,332 | 120 | 5 | 1 | 5 ppbbelow the action level |
| Aurora City of CO0103005 | 533,407 | 360 | 4 | 0 | 2.5 ppbbelow the action level |
| East Cherry Creek Valley WSD CO0103035 | 66,130 | 300 | 2 | 0 | 0 ppbbelow the action level |
| Arapahoe Cnty Wwwa CO0203002 | 31,000 | 420 | 5 | 0 | 1.1 ppbbelow the action level |
| Inverness WSD CO0203012 | 8,140 | 480 | 1 | 0 | 4 ppbbelow the action level |
| Travois HOA CO0103090 | 175 | 0 | 0 | 1 | 2 ppbbelow the action level |
| Sierra Bonita Estates CO0103710 | 122 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Country Gardens MHP CO0103025 | 115 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Rolling Plains Estate CO0103081 | 40 | 0 | 0 | 4 | 1 ppbbelow the action level |
| Southgate WSD CO0103721 | 55,000 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Southwest Metropolitan WSD CO0103723 | 48,648 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Platte Canyon WSD CO0103614 | 19,485 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Willows WD CO0103100 | 19,000 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Cherry Creek Village WD CO0103176 | 9,215 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Rangeview Md CO0103666 | 2,487 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Deer Trail Town of CO0103030 | 1,648 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Foxridge Farms MHP CO0103050 | 1,440 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Byers WSD CO0103010 | 1,000 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Bow Mar WSD CO0103153 | 899 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Columbine Lakes HOA CO0103183 | 843 | 0 | 0 | 0 | 2 ppbbelow the action level |
| The Meadows CO0103504 | 758 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woodshire East Mobile Home Park Ltd CO0103853 | 751 | 0 | 0 | 0 | 0 ppbbelow the action level |
| East Valley Md CO0103040 | 230 | 0 | 0 | 0 | 2.3 ppbbelow the action level |
| Stage Run HOA CO0103079 | 150 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Cedar Village MHP CO0103171 | 130 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Meadowood Village MHP CO0103506 | 125 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Country Homes Land Co CO0103186 | 100 | 0 | 0 | 0 | 9 ppbbelow the action level |
| Glendale City of CO0103055 | 4,400 | 0 | 0 | 0 | not reported |
| Joint Water Purification Plant CO0103418 | 0 | 0 | 0 | 0 | not reported |
| Wise Project CO0103843 | 0 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Arapahoe 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.
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.
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.
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.
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 reportsResource 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 Arapahoe County
17ZIP 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
- Aurora
- Centennial
- Cherry Hills Village
- Deer Trail
- Englewood
- Greenwood Village
- Littleton
View ZIP areas and understand coverage
- 80010Aurora
- 80012Aurora
- 80013Aurora
- 80014Aurora
- 80015Centennial
- 80016Aurora
- 80017Aurora
- 80018Aurora
- 80105Deer Trail
- 80110Englewood
- 80111Greenwood Village
- 80112Centennial
- 80113Cherry Hills Village
- 80120Littleton
- 80121Centennial
- 80122Centennial
- 80137Aurora
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.
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.