Is Lasalle, CO Tap Water Safe to Drink?
Graded C+, with 15 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
69.2/100
waterverge.com Lasalle, CO — Water Quality Report
Lasalle's drinking water received a grade of C+ (69.2 out of 100), indicating fair water quality. The city's 1 water system serves approximately 2,010 residents using purchased surface water.
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 27 violations on record, including 1 health-based violation. 15 remain unresolved.
What to know about Lasalle's water
Lasalle ranks #126 out of 246 cities in Colorado for water quality, placing it below average 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, Lasalle may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 17 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Lasalle, CO water safe to drink?
Lasalle's drinking water has significant quality concerns based on EPA testing data. With a grade of C+ (69.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,010 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Lasalle
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Lasalle's water quality assessment. Grade: C+ (69.2/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Public Notice.
Contaminants: Consumer Confidence Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Lasalle's water supply.
Well within EPA limits.
Violation history
Lasalle's water system has 27 total violations on record, including 1 health-based violation. 15 remain unresolved. 17 violations were issued in the last 5 years.
Where does Lasalle's water come from?
Lasalle's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 2,010 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Lasalle residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Lasalle'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.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
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.
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 Lasalle compares by contaminant
Explore where Lasalle ranks among all Colorado cities for specific contaminants.
Water source & infrastructure
Where Lasalle's water comes from
Lasalle'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 2,010 people through 1 water system.
Water systems serving Lasalle
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LA SALLE TOWN OF | CO0162466 | 2,010 | SWP |
How Lasalle compares
Full Colorado rankings →Lasalle's score of 69.2/100 is above the average of 45/100 among major Colorado cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Colorado rankings →Learn more about your water
Guides and resources related to Lasalle's water quality findings.
Explore water quality across Weld
Frequently asked questions
Is Lasalle, CO tap water safe to drink?
Lasalle's water quality earned a grade of C+ (69.2/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #126 out of 246 cities tested in Colorado.
What contaminants are in Lasalle's water?
Lead was measured at 0.0 ppb (90th percentile). 27 violations are on record.
How is Lasalle'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 Lasalle?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lasalle's water come from?
Lasalle's water is sourced from Purchased surface water. The city has 1 water system serving approximately 2,010 residents.
What health violations has Lasalle's water system had?
Lasalle has 1 health-based violation on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 15 violations remain unresolved.
How does Lasalle's water compare to other cities?
Lasalle ranks #126 out of 246 cities in Colorado (better than 49% of state cities) and #10963 out of 15744 cities nationally (30th percentile). The grade of C+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lasalle's small water system affect quality?
Lasalle's system serves approximately 2,010 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 27 violations on record.