Water Quality Report · Updated October 07, 2026
LAS CRUCES MUNICIPAL WATER SYSTEM
LAS CRUCES MUNICIPAL WATER SYSTEM delivers tap water graded D (58/100) by TapWaterSafety.org. The utility serves approximately 98,175 residents in LAS CRUCES, New Mexico using groundwater. The most significant water quality concerns are: Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Bromodichloromethane significantly above health guideline. For questions, the utility can be reached at 575-528-3514.
Is LAS CRUCES tap water safe to drink?
LAS CRUCES MUNICIPAL WATER SYSTEM delivers tap water that earns a grade of D (58/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including arsenic significantly above health guideline.
The utility serves 98,175 residents in LAS CRUCES, drawing from groundwater. Despite being legal under US EPA standards, this water would fail the European Union's Drinking Water Directive, primarily due to arsenic significantly above health guideline.
Public testing data identifies 16 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Total trihalomethanes (TTHMs), Bromodichloromethane, Dibromochloromethane, Dibromoacetic acid, Haloacetic acids (HAA9), Haloacetic acids (HAA5), Chromium (hexavalent), Dichloroacetic acid, Bromoform, Radium, combined (-226 and -228), Chloroform, Uranium, Trichloroacetic acid, Nitrate and nitrite, Manganese. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for LAS CRUCES MUNICIPAL WATER SYSTEM (system ID NM3511707) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Ground Water Rule | Missed testing or reporting | 11/08/2025 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for LAS CRUCES residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for LAS CRUCES MUNICIPAL WATER SYSTEM.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 3.1 ppb, 775x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 34.3 ppb, 229x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 8.65 ppb, 144x above the EWG health guideline of 0.06 ppb.
Contact LAS CRUCES MUNICIPAL WATER SYSTEM
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for LAS CRUCES
Filters matched to the specific contaminants in this water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts like TTHM. Look for NSF/ANSI 53 VOC or chloroform reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 58/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
3.1 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 775× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
34.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 229× over |
| Bromodichloromethane Disinfection byproduct |
8.65 ppb | 0.06 | — | — | — | — | — | 144× over |
| Dibromochloromethane Disinfection byproduct |
13.1 ppb | 0.1 | — | — | — | — | — | 131× over |
| Dibromoacetic acid Disinfection byproduct |
3.86 ppb | 0.03 | — | — | — | — | — | 129× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
7.54 ppb | 0.06 | — | — | — | — | — | 126× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
9.42 ppb | 0.1 | 60.0 | 60 | — | — | — | 94× over |
| Chromium (hexavalent) Heavy metal |
1.12 ppb | 0.02 | — | — | — | — | — | 56× over |
| Dichloroacetic acid Disinfection byproduct |
3.77 ppb | 0.2 | — | — | — | — | — | 19× over |
| Bromoform Disinfection byproduct |
8.03 ppb | 0.5 | — | — | — | — | — | 16× over |
| Radium, combined (-226 and -228) Radiological |
0.62 pCi/L | 0.05 | 5.0 | — | — | — | — | 12× over |
| Chloroform Disinfection byproduct |
4.44 ppb | 0.4 | — | — | — | — | — | 11× over |
| Uranium Radiological |
4.12 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 9.6× over |
| Trichloroacetic acid Disinfection byproduct |
0.754 ppb | 0.1 | — | — | — | — | — | 7.5× over |
| Nitrate and nitrite Inorganic |
0.505 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.6× over |
| Manganese Heavy metal |
107.5 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Trichloroethylene Volatile organic compound |
0.127 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0887 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| 1,2-Dichloropropane Volatile organic compound |
0.116 ppb | 0.5 | 5.0 | — | — | — | — | Below guideline |
| Molybdenum Other |
7.07 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
2.73 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
55.6 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Chlorate Disinfection byproduct |
4.55 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.525 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.492 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.2 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Di(2-ethylhexyl) adipate Other |
0.328 ppb | 200.0 | 400.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
1.04 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.143 ppb | — | 100.0 | — | — | — | — | Below guideline |
| cis-1,2-Dichloroethylene Volatile organic compound |
0.0611 ppb | — | 70.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
0.4 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Fluoride Inorganic |
0.545 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.164 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
72.2 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
LAS CRUCES MUNICIPAL WATER SYSTEM service area
This water system serves 1 community in Dona Ana County, New Mexico. Click any city for its dedicated tap water quality page.
Find the right filter for LAS CRUCES water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.