Foss, OK 73647

2 water systems • 139 residents

Severe water quality issues - filtration essential

Score: 18/100

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

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

Contaminants Detected

403

Violations on Record

Health-Based Violations

Recent Violations

Grade Breakdown

Contaminant Count0 / 25

Violation History0 / 25

Contaminant Severity4 / 25

System Compliance0 / 15

Enforcement History0 / 10

Total Score18%

18 / 100 points

Recommended Water Filters

✓Point-of-Use Carbon Filter (NSF-certified for lead)
✓Ultraviolet (UV) Purification
✓Activated Carbon Filter (disinfection byproducts)
✓Whole Home Carbon Filter System

Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Foss vs OK & National Average

Detected Contaminants

43 contaminants detected across water systems serving this ZIP code

Contaminant	Category
Atrazine	Agricultural
Glyphosate	Agricultural
Simazine	Agricultural
Total Haloacetic Acids (HAA5)	Disinfection Byproduct
TTHM	Disinfection Byproduct
Lead and Copper Rule	Heavy Metal
LEAD AND COPPER RULE REVISIONS	Heavy Metal
Coliform (TCR)	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
CARBON, TOTAL	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
Interim Enhanced Surface Water Treatment Rule	Other
LASSO	Other
Methoxychlor	Other
OXAMYL	Other
Pentachlorophenol	Other
Picloram	Other
Total Polychlorinated Biphenyls (PCB)	Other
Toxaphene	Other
Combined Radium (-226 and -228)	Radiological
Combined Uranium	Radiological
Gross Alpha, Excl. Radon and U	Radiological
Gross Beta Particle Activity	Radiological
HEXACHLOROBENZENE	Volatile Organic

Water System Information

Systems Serving This ZIP:: FOSS, FOSS RESERVOIR MCD
Population Served:: 139
Systems With Violations:: 2 of 2
Major Violations:: 309
Enforcement Actions:: 401

Nearby Areas

73021

Colony

73632

Cordell • 5.1 mi away

73622

Bessie • 7.3 mi away

73661

Rocky • 9.5 mi away

73641

Dill City • 9.8 mi away

73664

Sentinel • 10.1 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.