Is Platteville, CO Tap Water Safe to Drink?
Graded B+ — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
83.4/100
waterverge.com Platteville, CO — Water Quality Report
Platteville's drinking water received a grade of B+ (83.4 out of 100), indicating good water quality. The city's 2 water systems serve approximately 2,984 residents using purchased surface water.
Lead levels were measured at 1.0 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 16 violations on record, including 0 health-based violations. 4 remain unresolved.
What to know about Platteville's water
Platteville ranks #67 out of 246 cities in Colorado for water quality, placing it mid-range in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Platteville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Platteville, CO water safe to drink?
Platteville's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (83.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 2,984 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Platteville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Platteville's water quality assessment. Grade: B+ (83.4/100).
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Lead and Copper Rule.
Federal disaster declaration (FEMA DR-4145). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3365). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Platteville's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Platteville's water system has 16 total violations on record, including 0 health-based violations. 4 remain unresolved. 2 violations were issued in the last 5 years.
Flood & environmental risk
Weld County has experienced 7 federally declared disasters since 1969. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Big Dry Creek, South Platte River.
Where does Platteville's water come from?
Platteville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 2,984 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Big Dry Creek (river), South Platte River (river).
What Platteville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Platteville'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.
Platteville'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 Platteville
Industrial polluters nearby
Reported releases to surface water by facilities near Platteville, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
SMYRNA READY MIX CONCRETE LLC - DEL CAMINO READY MIX LONGMONT, CO80501 | — | — | 10.0 mi |
ARC COLORADO INC. LONGMONT, CO80504 | — | — | 7.8 mi |
BOULDER SCIENTIFIC CO LLC - SPECIALTY PLACE LONGMONT, CO80504 | — | — | 9.3 mi |
BURNCO COLORADO LLC - FIRESTONE LONGMONT, CO80504 | — | — | 8.0 mi |
HOLCIM WCR INC FIRESTONE READY MIX PLANT LONGMONT, CO80504 | — | — | 5.5 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtWeld 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
Weld County has experienced 7 federally declared disasters since 1969. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Platteville's water supply, we recommend the following filter types.
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. | 1.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 1.62 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Platteville compares by contaminant
Explore where Platteville ranks among all Colorado cities for specific contaminants.
Water source & infrastructure
Where Platteville's water comes from
Platteville's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 2,984 people through 2 water systems.
Water bodies near Platteville
Platteville is located near 2 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Platteville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| PLATTEVILLE TOWN OF | CO0162615 | 2,900 | SWP |
| COLDWATER DAIRY | TX2110004 | 84 | GW |
How Platteville compares
Full Colorado rankings →Platteville's score of 83.4/100 is above the average of 45/100 among major Colorado cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Colorado rankings →About Platteville, CO
Learn more about your water
Guides and resources related to Platteville's water quality findings.
Explore water quality across Weld
Frequently asked questions
Is Platteville, CO tap water safe to drink?
Platteville's water quality earned a grade of B+ (83.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #67 out of 246 cities tested in Colorado.
What contaminants are in Platteville's water?
Lead was measured at 1.0 ppb (90th percentile). 16 violations are on record.
How is Platteville'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 Platteville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Platteville's water come from?
Platteville's water is sourced from Purchased surface water. The city has 2 water systems serving approximately 2,984 residents.
How does Platteville's water compare to other cities?
Platteville ranks #67 out of 246 cities in Colorado (better than 73% of state cities) and #6445 out of 15744 cities nationally (59th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.