A86/100
Littleton Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 121,247 residents · Colorado
What's In Littleton's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.009 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
KEN CARYL WSD
Population Served
12,000
Water Source
Purchased Surface Water
System ID
CO0103075
PLATTE CANYON WSD
Population Served
19,485
Water Source
Purchased Surface Water
System ID
CO0103614
FOXRIDGE FARMS MHP
Population Served
1,440
Water Source
Groundwater
System ID
CO0103050
SOUTHWEST METROPOLITAN WSD
Population Served
48,648
Water Source
Purchased Surface Water
System ID
CO0103723
STERLING RANCH CAB
Population Served
11,357
Water Source
Purchased Surface Water
System ID
CO0118724
ROXBOROUGH WSD
Population Served
13,765
Water Source
Surface Water
System ID
CO0118055
EAGLE RIVER VILLAGE MHP
Population Served
1,500
Water Source
Groundwater
System ID
CO0119234
LAKEHURST WSD
Population Served
12,000
Water Source
Purchased Surface Water
System ID
CO0130466
NORTHBROOK VILLAS MHC
Population Served
1,052
Water Source
Purchased Surface Water
System ID
CO0143552
Frequently Asked Questions About Littleton Water
Is Littleton tap water safe to drink?
Littleton, Colorado tap water receives a grade of A (86/100), which is considered excellent. Out of 54 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Littleton's water?
Of the 54 contaminants tested in Littleton's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Littleton have any water quality violations?
Yes, Littleton has 82 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MON, MR. 8 of these are health-based violations, which are the most serious category.
Do I need a water filter in Littleton?
Littleton water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Littleton's tap water come from?
Littleton's drinking water is sourced from purchased surface water and supplied by KEN CARYL WSD and 8 other water system(s). The system serves approximately 121,247 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Littleton's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Littleton's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Littleton's water compare to other cities in Colorado?
Littleton's water quality score of 86/100 earns a grade of A, which is considered excellent. This places Littleton among the better-performing water systems in Colorado. Visit our Colorado state page to see how all cities in the state compare.
What should I do if I'm concerned about Littleton's water quality?
If you have concerns about Littleton's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (KEN CARYL WSD) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.