Is Prague, OK Tap Water Safe to Drink?
Graded D+, with 14 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
52/100
waterverge.com Prague, OK — Water Quality Report
Prague's drinking water received a grade of D+ (52 out of 100), indicating poor water quality. The city's 1 water system serves approximately 2,395 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 873 violations on record, including 10 health-based violations. 14 remain unresolved.
What to know about Prague's water
Prague ranks #183 out of 358 cities in Oklahoma for water quality, placing it below average in the state.
Prague relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Prague may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 566 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Prague, OK water safe to drink?
Prague's drinking water has significant quality concerns based on EPA testing data. With a grade of D+ (52/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,395 residents using groundwater (wells).
Recent water quality updates for Prague
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Prague's water quality assessment. Grade: D+ (52/100).
Contaminants: Chlorine, Revised Total Coliform Rule.
1 health-based. Contaminants: Revised Total Coliform Rule.
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-693). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Prague's water supply.
Well within EPA limits.
Violation history
Prague's water system has 873 total violations on record, including 10 health-based violations. 14 remain unresolved. 566 violations were issued in the last 5 years.
Flood & environmental risk
Lincoln County has experienced 5 federally declared disasters since 1974. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Prague's water come from?
Prague's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,395 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Prague residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Prague's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Prague's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Prague
Industrial polluters nearby
Reported releases to surface water by facilities near Prague, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
SCISSORTAIL ENGRY L/PADEN PLT PADEN, OK74860 | — | — | 9.4 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtLincoln County is currently in D3 (extreme drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Lincoln County has experienced 5 federally declared disasters since 1974. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Prague compares by contaminant
Explore where Prague ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Prague's water comes from
Prague's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 2,395 people through 1 water system.
Water systems serving Prague
| System Name | PWSID | Population | Source |
|---|---|---|---|
| PRAGUE | OK2004101 | 2,395 | GW |
How Prague compares
Full Oklahoma rankings →Prague's score of 52/100 is above the average of 45/100 among major Oklahoma cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Prague, OK
Learn more about your water
Guides and resources related to Prague's water quality findings.
Explore water quality across Lincoln
Frequently asked questions
Is Prague, OK tap water safe to drink?
Prague's water quality earned a grade of D+ (52/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #183 out of 358 cities tested in Oklahoma.
What contaminants are in Prague's water?
Lead was measured at 0.0 ppb (90th percentile). 873 violations are on record.
How is Prague's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Prague?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Prague's water come from?
Prague's water is sourced from Groundwater. The city has 1 water system serving approximately 2,395 residents.
What health violations has Prague's water system had?
Prague has 10 health-based violations on record. The most recent violation was recorded in May 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 14 violations remain unresolved.
Is Prague's groundwater at risk of contamination?
Prague uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 873 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Prague's water compare to other cities?
Prague ranks #183 out of 358 cities in Oklahoma (better than 49% of state cities) and #12808 out of 15744 cities nationally (19th percentile). The grade of D+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Prague's small water system affect quality?
Prague's system serves approximately 2,395 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 873 violations on record.