01The verdict: is Zia Pueblo water safe?
Zia Pueblo's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (80/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 771 residents using groundwater (wells).
Copper is over its legal limit
Measured at 1.59 mg/L against the EPA Action Level of 1.3 mg/L. The ledger below shows how far over — and which filter removes it.
See the measurement ↓Lead is well under the limit
90th-percentile lead is 0.5 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓1 violation in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Zia Pueblo's drinking water received a grade of B+ (80 out of 100), indicating good water quality. The city's 1 water system serves approximately 771 residents using groundwater.
Lead levels were measured at 0.5 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 41 violations on record, including 12 health-based violations. 9 remain unresolved.
Zia Pueblo ranks #35 out of 153 cities in New Mexico for water quality, placing it above average in the state. Zia Pueblo 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, Zia Pueblo may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Zia Pueblo's water
Every contaminant flagged in Zia Pueblo, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Over Limit — EPA Action Level: 1.3 mg/L
Exceeds the EPA action level. Copper leaches from household plumbing — flush taps for 30 seconds before drinking, and consider a certified filter.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. | 0.5 | 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. | 1.59 | 1.3 | mg/L | Inorganic | Over Limit |
Cities ranked by 90th-percentile lead PF PFAS in New Mexico
Cities ranked by compounds detected Cu Copper in New Mexico
Cities ranked by 90th-percentile copper
03Zia Pueblo's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 41 violations on record, including 12 health-based violations. 9 remain unresolved.
8 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▲ Up 0.50 ppb since 1994. Latest reading: 0.50 ppb (2022) — 3% of the action level. Sampled at higher-risk homes (90th percentile).
1.6mg/L(2001)
One sampling round on record — 122% of the 1.3mg/L EPA action level. Sampled at higher-risk homes (90th percentile).
04Where Zia Pueblo's water comes from
Zia Pueblo's drinking water is drawn from underground aquifers through wells.
Groundwater
Underground aquifers reached by wells — naturally filtered, but can carry minerals like arsenic and nitrate.
Local treatment
Groundwater generally needs less treatment — typically disinfection and, where needed, mineral removal.
1 system
1 water system, operated under native american ownership.
771 people
Residents served across Zia Pueblo's service area.
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 native american ownership and serves approximately 771 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| Zia Pueblo | 063500123 | 771 | Groundwater |
05Pressure on Zia Pueblo's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Flood & storm history
5 federal disaster declarations on record for Sandoval County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
06How Zia Pueblo compares
Scores for nearby New Mexico cities on one line, with the average marked.
dashed line = New Mexico average (49/100)
Zia Pueblo scores 80/100 — above the New Mexico average of 49/100. It outscores 8 of 10 nearby cities. Full New Mexico rankings →
40.2 / 100FLas Cruces, NM
40.1 / 100FSanta Fe, NM
35.7 / 100BRio Rancho, NM
83.8 / 100DRoswell, NM
45.8 / 100FFarmington, NM
40.4 / 100
07What to do at home
Steps matched to what testing actually found in Zia Pueblo's water — not generic advice.
Filter drinking & cooking water
NSF-certified water filter. Copper exceeds the EPA action level of 1.3 mg/L
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Zia Pueblo alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Zia Pueblo, NM tap water safe to drink?
Zia Pueblo's water quality earned a grade of B+ (80/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #35 out of 153 cities tested in New Mexico.
What contaminants are in Zia Pueblo's water?
Lead was measured at 0.5 ppb (90th percentile). 41 violations are on record.
How is Zia Pueblo'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 Zia Pueblo?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Zia Pueblo's water come from?
Zia Pueblo's water is sourced from Groundwater. The city has 1 water system serving approximately 771 residents.
What health violations has Zia Pueblo's water system had?
Zia Pueblo has 12 health-based violations on record. The most recent violation was recorded in April 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 9 violations remain unresolved.
Is Zia Pueblo's groundwater at risk of contamination?
Zia Pueblo 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 41 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 Zia Pueblo's water compare to other cities?
Zia Pueblo ranks #35 out of 153 cities in New Mexico (better than 77% of state cities) and #7976 out of 15382 cities nationally (48th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Zia Pueblo's small water system affect quality?
Zia Pueblo's system serves approximately 771 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 41 violations on record.