Littleton, CO 80120

13 water systems • 8,088 residents

Moderate water quality - consider filtration

Score: 42/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

Contaminants Detected

1,022

Violations on Record

Health-Based Violations

Recent Violations

Grade Breakdown

Contaminant Count0 / 25

Violation History15 / 25

Contaminant Severity21 / 25

System Compliance3 / 15

Enforcement History0 / 10

Total Score42%

42 / 100 points

Recommended Water Filters

✓Point-of-Use Carbon Filter (NSF-certified for lead)
✓Reverse Osmosis or Ion Exchange Filter
✓Ultraviolet (UV) Purification
✓Activated Carbon Filter (disinfection byproducts)

Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Littleton vs CO & National Average

Detected Contaminants

57 contaminants detected across water systems serving this ZIP code

Contaminant	Category
Atrazine	Agricultural
Glyphosate	Agricultural
Nitrate	Agricultural
Nitrate-Nitrite	Agricultural
Simazine	Agricultural
Total Haloacetic Acids (HAA5)	Disinfection Byproduct
TTHM	Disinfection Byproduct
Antimony, Total	Heavy Metal
Arsenic	Heavy Metal
Barium	Heavy Metal
Beryllium, Total	Heavy Metal
Cadmium	Heavy Metal
Chromium	Heavy Metal
Lead and Copper Rule	Heavy Metal
LEAD AND COPPER RULE REVISIONS	Heavy Metal
Mercury	Heavy Metal
Selenium	Heavy Metal
Thallium, Total	Heavy Metal
Coliform (TCR)	Microorganism
E. COLI	Microorganism
Revised Total Coliform Rule	Microorganism
1,2-DIBROMO-3-CHLOROPROPANE	Other
2,4-D	Other
2,4,5-TP	Other
Benzo(a)pyrene	Other
BHC-GAMMA	Other
Carbofuran	Other
Chloramine	Other
Chlordane	Other
Chlorine	Other
Consumer Confidence Rule	Other
Dalapon	Other
Di(2-ethylhexyl) adipate	Other
Di(2-ethylhexyl) phthalate	Other
Dinoseb	Other
Diquat	Other
Endothall	Other
Endrin	Other
ETHYLENE DIBROMIDE	Other
Heptachlor	Other
Heptachlor epoxide	Other
Hexachlorocyclopentadiene	Other
LASSO	Other
Long Term 2 Enhanced Surface Water Treatment Rule	Other
Methoxychlor	Other
OXAMYL	Other
Pentachlorophenol	Other
Picloram	Other
Public Notice	Other
Stage 1 Disinfectants and Disinfection Byproducts Rule	Other
Surface Water Treatment Rule	Other
Total Polychlorinated Biphenyls (PCB)	Other
Toxaphene	Other
Combined Radium (-226 and -228)	Radiological
Combined Uranium	Radiological
Gross Alpha, Excl. Radon and U	Radiological
HEXACHLOROBENZENE	Volatile Organic

Water System Information

Systems Serving This ZIP:: WESTERN HILLS MHP, EL MORRO MOBILE ESTATES, NORTHBROOK VILLAS MHC, W BAR K MOBILE HOME PARK, EAGLE RIVER VILLAGE MHP +5 more
Population Served:: 8,088
Systems With Violations:: 10 of 13
Major Violations:: 675
Enforcement Actions:: 1,013

Nearby Areas

80122

Littleton • 3.1 mi away

80128

Littleton • 3.9 mi away

80110

Englewood • 4 mi away

80129

Littleton • 4 mi away

80123

Littleton • 4.5 mi away

80227

Denver • 5.7 mi away

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.