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EPA WATER QUALITY DATA · CO

Is Arapahoe County Tap Water Safe in 2026?

Population-weighted grade and city-level UCMR5 risk bands for 1 WaterCheckup cities in Arapahoe County. "At Risk" means at least one analyte above an EPA limit or a regulated PFAS violation for that system. "Safe" means no such flag and a low-concern city profile.

COUNTY GRADE
F
Score 0
1
Total cities
1
At Risk
0
Safe
370K
Population served
TOP CONTAMINANTS IN ARAPAHOE COUNTY (UCMR5)

Most common analytes with detections (>0) across cities in this county — each city counted once per compound.

1.PFBA1 city
2.PFBS1 city
3.PFHxA1 city
4.PFHxS1 city
5.PFOA1 city
6.PFOS1 city
7.PFPeA1 city
8.PFPeS1 city
CITIES IN ARAPAHOE COUNTY
CITYGRADECONTAMINANTS ABOVE LIMITPOPULATION
AuroraFAT RISK3370K
FILTER RECOMMENDATIONS

Typical picks for households in Arapahoe County when UCMR5 shows PFAS or related analytes — same product lines we feature on city pages.

TOP PICKS FOR ARAPAHOE COUNTY
⚠ PFBA and related contaminants in county UCMR data
#1
Waterdrop G3P800 RO
EDITORS PICK
Waterdrop  ·  ~$849
Tankless 800 GPD, removes 99%+ PFAS & lead, 10-stage filtration. Smart faucet TDS display.
WHY THIS FOR ARAPAHOE COUNTY · Chosen for Arapahoe County because 1 of 1 tracked city shows at least one UCMR analyte above an EPA limit or a regulated violation — reverse osmosis removes 99%+ of PFAS and many co-occurring pollutants at the tap.
#2
Aquasana SmartFlow RO
MOST CERTIFIED
Aquasana  ·  ~$449
WQA Gold Seal + NSF 42/53/58/401. Most certifications of any under-sink RO. Removes 90+ contaminants.
#3
AquaTru Under-Sink RO
EASIEST FILTER CHANGE
AquaTru  ·  ~$375
NSF 42/53/58 certified. Quick-change filters, no tools. Compact tankless design, 4-stage filtration.
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