Is Truchas, NM Tap Water Safe to Drink?
Graded F, with 47 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
42/100
waterverge.com Truchas, NM — Water Quality Report
Truchas's drinking water received a grade of F (42 out of 100), indicating failing water quality. The city's 1 water system serves approximately 629 residents using groundwater.
Lead levels were measured at 2.2 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 66 violations on record, including 22 health-based violations. 47 remain unresolved.
What to know about Truchas's water
Truchas ranks #139 out of 163 cities in New Mexico for water quality, placing it among the lowest-rated in the state.
Truchas 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, Truchas may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 16 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Truchas, NM water safe to drink?
Truchas's drinking water has significant quality concerns based on EPA testing data. With a grade of F (42/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 629 residents using groundwater (wells).
Recent water quality updates for Truchas
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Truchas's water quality assessment. Grade: F (42/100).
11 health-based. Contaminants: Groundwater Rule, Lead and Copper Rule.
Contaminants: Groundwater Rule.
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS, Lead and Copper Rule.
Federal disaster declaration (FEMA DR-4152). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3229). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Truchas's water supply.
Well within EPA limits.
Violation history
Truchas's water system has 66 total violations on record, including 22 health-based violations. 47 remain unresolved. 16 violations were issued in the last 5 years.
Flood & environmental risk
Rio Arriba County has experienced 4 federally declared disasters since 1973. 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 Santa Cruz River.
Where does Truchas's water come from?
Truchas's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 629 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Santa Cruz River (river).
What Truchas residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Truchas'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.
Truchas'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
Drought conditions
D3 — extreme droughtRio Arriba 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
Rio Arriba County has experienced 4 federally declared disasters since 1973. 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. | 2.2 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Truchas compares by contaminant
Explore where Truchas ranks among all New Mexico cities for specific contaminants.
Water source & infrastructure
Where Truchas's water comes from
Truchas'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 629 people through 1 water system.
Water bodies near Truchas
Truchas is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Truchas
| System Name | PWSID | Population | Source |
|---|---|---|---|
| TRUCHAS MDWCA | NM3503421 | 629 | GW |
How Truchas compares
Full New Mexico rankings →Truchas's score of 42/100 is on par with the average of 44/100 among major New Mexico cities. It outscores 7 of 10 nearby cities.
Nearby cities
View New Mexico rankings →About Truchas, NM
Wikipedia →Truchas is a census-designated place in Rio Arriba County, New Mexico, United States. Located along the scenic High Road to Taos, it is halfway between Santa Fe in the south, and Taos to the north. Truchas has the ZIP code 87578. The 87578 ZIP Code Tabulation Area, which includes the nearby village of Cordova, New Mexico, had a population of 278 in 2023.
Learn more about your water
Guides and resources related to Truchas's water quality findings.
Explore water quality across Rio Arriba
Frequently asked questions
Is Truchas, NM tap water safe to drink?
Truchas's water quality earned a grade of F (42/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #139 out of 163 cities tested in New Mexico.
What contaminants are in Truchas's water?
Lead was measured at 2.2 ppb (90th percentile). 66 violations are on record.
How is Truchas'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 Truchas?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Truchas's water come from?
Truchas's water is sourced from Groundwater. The city has 1 water system serving approximately 629 residents.
What health violations has Truchas's water system had?
Truchas has 22 health-based violations 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. 47 violations remain unresolved.
Is Truchas's groundwater at risk of contamination?
Truchas 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 66 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 Truchas's water compare to other cities?
Truchas ranks #139 out of 163 cities in New Mexico (better than 15% of state cities) and #14924 out of 15744 cities nationally (5th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Truchas's small water system affect quality?
Truchas's system serves approximately 629 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 66 violations on record.