Water Issues

Water In The News

New Mexico Groundwater Report  (2026)
Looming Groundwater Crisis’ (2026)

City of Deming (Needs more research)

Deming 40 Year Water Plan, 2009

City of Deming Water Conservation Plan, 2020

Deming Alternative Water Source (Audobon, 2018)

Deming Well Locations, 2024

Deming Well Water Depth Measurements, 2024

City of Deming New Well Request, April 2025.
(1,000' w/20" casing 10 miles outside of town)  (Why?)

Additional Resources: 

Soil and Water Conservation District Mission

New Mexico Groundwater Alliance

NM 50 Year Water Action Plan (August, 2025)

New Mexico Interstate Stream Commission:

Cattle Grazing & The Dust Storm Connection

Your intuition that these processes connect to dust storms is exactly right, and the connection is both direct and well-documented scientifically.

The Physics of Dust Entrainment

Wind can lift and carry soil particles when wind speed exceeds the threshold velocity for that particular particle size and surface condition. That threshold depends critically on:

• Particle size — fine sand and silt are most easily lifted; larger gravel particles are too heavy, very fine clay particles tend to bind together

• Surface roughness — vegetation and biological soil crust create drag that slows wind near the surface and raises the threshold velocity needed to lift particles

• Soil moisture — moist soil particles bind together and resist entrainment; dry particles lift easily

• Soil cohesion — biological soil crusts bind particles together; bare compacted soil without crust is paradoxically more erodible than crust-protected soil despite being harder

Overgrazing degrades all of these protective factors simultaneously — removing vegetation, destroying biological soil crusts, and leaving bare soil exposed to wind. The result is a dramatic reduction in the threshold wind velocity needed to initiate dust entrainment. Areas that were effectively wind-stable under native grassland become actively erodible under heavily grazed conditions.

The Chihuahuan Desert — Already Dust-Prone

The Chihuahuan Desert portion of Luna County sits in a region that was already prone to dust emission before European settlement, for natural reasons:

The lake bed legacy. During wetter climatic periods in the past — particularly during the last glacial maximum roughly 20,000 years ago and subsequent wet periods — the closed basins of southern New Mexico contained pluvial lakes. Lake Animas in Hidalgo County and various wet playas across Luna County held significant standing water. As these lakes dried over millennia, they left behind extensive deposits of fine-grained lacustrine sediments — silts and clays that are ideal dust source material. The White Sands gypsum dunes in nearby Doña Ana and Otero Counties are the most dramatic expression of this process, but similar fine-grained lake bed deposits underlie much of the southern Mimbres Basin.

These ancient lake bed sediments are exposed at or near the surface across parts of the basin floor. Even without overgrazing they represent a natural dust source during dry windy periods. With overgrazing removing the biological soil crusts and vegetation that would otherwise protect them, they become dramatically more erodible.

The wind regime. Southern New Mexico experiences strong southwesterly winds in spring — March through May — as part of the regional atmospheric circulation pattern. This is climatologically the driest period of the year, before the summer monsoon arrives, and coincides with the period of lowest soil moisture and vegetation cover. Spring winds regularly exceed 30 to 40 miles per hour across the Deming plain, well above the threshold for dust entrainment from degraded surfaces.

Drought amplification. The American Southwest has been experiencing prolonged drought conditions intensified by climate change. Drought reduces vegetation cover and soil moisture simultaneously — both protective factors for dust entrainment. In the context of already degraded grazing lands, drought pushes conditions from marginal to severely erodible.

Evidence From Luna County Specifically

The Deming area has documented a significant increase in dust storm frequency and intensity over recent decades. The PM10 (particulate matter under 10 micrometers) readings for Luna County that we noted earlier — 26.3 µg/m³ annual average, described as "near US average" — actually understate the problem because they're annual averages that smooth out the episodic dust events that drive acute health impacts.

During major dust storms, PM10 readings in the Deming area can spike to hundreds or even thousands of µg/m³ — levels that represent serious acute health risks, particularly for people with respiratory conditions. The 24-hour PM10 standard is 150 µg/m³, and major dust events routinely exceed this by large multiples.

Studies of dust source areas across southern New Mexico using remote sensing and back-trajectory analysis — essentially tracking where dust clouds originated — have identified the dry playas and degraded rangelands of Luna County and surrounding areas as major regional dust sources. The specific combination of fine-grained lake bed sediments, destroyed biological soil crusts, sparse vegetation, and strong spring winds makes this one of the more active dust source regions in the American Southwest.

The Feedback Loop — Dust, Soils, and Water

Here the story becomes self-reinforcing in a troubling way. Dust emission isn't just an air quality problem — it represents the permanent loss of the finest, most nutrient-rich fraction of the soil. Every dust storm that carries fine particles off the Luna County landscape is removing material that:

• Held the most soil moisture

• Contained the most organic matter and nutrients

• Was most capable of supporting vegetation regrowth

• Provided the binding agent that held coarser particles in place

As the fines are progressively removed, what remains is coarser, less fertile, less water-retentive soil that supports even sparser vegetation — which makes it even more susceptible to both wind erosion and water runoff. The landscape degrades progressively toward what ecologists call a desertified state — a fundamentally different ecosystem configuration that is stable in its degraded condition and extremely difficult to restore.

This degradation also reduces the infiltration capacity of the rangeland soils — further reducing aquifer recharge at exactly the time when the aquifer is being most severely overdrafted.

The Dust-Health-Water Justice Triangle

There's a human dimension here that connects directly to the colonia story. Dust storms in the Deming area disproportionately affect:

People with respiratory conditions — asthma, COPD, and valley fever (coccidioidomycosis, a fungal infection spread in dust) are significantly more prevalent in communities with high dust exposure. Valley fever in particular has been increasing across the American Southwest in correlation with drought and land disturbance, and Luna County sits in an endemic zone.

Outdoor workers — agricultural workers, many of whom live in colonias and work in the fields during the spring dust season, face the highest exposure.

People without air conditioning — who must choose between heat and dust exposure when windows are the only ventilation option.

Children — whose developing lungs are more vulnerable to particulate exposure and who spend more time outdoors.

These are exactly the same populations — colonia residents, agricultural workers, low-income rural families — who face the groundwater quality and quantity problems we've been discussing throughout our conversation. The same historical land use decisions that degraded rangeland hydrology also degraded air quality, and the health burdens fall on the same communities.

The Historical Arc
It's worth stepping back and noting that this degradation has a specific historical timeline. The Chihuahuan Desert grasslands of Luna County supported intact native grasslands — dominated by black grama, blue grama, tobosa, and other perennial grasses — before large-scale Anglo-American ranching began in the 1880s. The arrival of the railroad through Deming in 1881 opened the region to cattle markets and triggered rapid stocking of the rangeland, often far beyond its carrying capacity.

The drought of the 1890s — one of the most severe in the historical record — hit an already overstocked, degraded landscape catastrophically. Massive cattle die-offs were followed by the conversion of millions of acres from perennial grassland to the shrub-dominated desert we see today. The biological soil crusts that had taken centuries to develop were destroyed. The native grass seed bank in many areas was lost. Mesquite and creosote expanded dramatically into the grassland matrix.

That transition — from grassland to shrubland — is largely irreversible at human timescales without active and expensive intervention. The landscape of Luna County today reflects not current grazing pressure alone but the accumulated legacy of 140 years of land use, and the hydrologic and aeolian (wind erosion) consequences are baked into the current system regardless of what happens to grazing going forward.

How Cattle Grazing Affects Water Availability

(ClaudeAI Summary)
The effects operate through several distinct but interacting mechanisms.

1. Soil Compaction and Reduced Infiltration

This is probably the most direct and significant hydrologic impact of grazing. Cattle are heavy animals — a mature cow weighs 1,000 to 1,500 pounds — and their hooves exert enormous pressure on soil. In arid environments where soils are already fragile, repeated trampling compacts the soil surface, collapsing the pore spaces that allow rainfall to infiltrate.

The consequences are significant:

Reduced recharge. Water that would have slowly infiltrated into the soil and eventually reached the water table instead runs off the surface. In a basin like the Mimbres where total recharge is already only a few percent of annual precipitation — we noted earlier that Hanson et al. estimated total recharge at about 35.6 million cubic meters per year against precipitation many times that — even modest reductions in infiltration rate translate to meaningful reductions in aquifer recharge.

Increased runoff velocity. Water moving across a compacted surface moves faster than water infiltrating through open soil. Fast-moving runoff carries more sediment, causes more erosion, and reaches stream channels more quickly — producing flashier, shorter-duration flood events rather than the slow sustained infiltration that recharges aquifers most effectively.

Destruction of biological soil crusts. This deserves particular emphasis in the Chihuahuan Desert context. Desert soils between plants are not bare dirt — they are colonized by a community of cyanobacteria, lichens, mosses, and fungi that form a biological soil crust (sometimes called cryptobiotic crust or microbiotic crust). This crust is extraordinarily important hydrologically:

• It stabilizes the soil surface against wind and water erosion

• It increases water infiltration by creating a rough, porous surface texture

• It fixes atmospheric nitrogen, contributing to soil fertility

• It reduces evaporation from the soil surface by creating a physical barrier

Cattle hooves destroy biological soil crusts with remarkable efficiency. A single pass of a cow hoof can obliterate crust that took 50 to 250 years to develop in an arid environment. Once destroyed, the crust recovers extremely slowly — if the area continues to be grazed, it may never recover at all. The resulting bare, compacted soil surface sheds water rather than absorbing it, fundamentally altering the local water budget.

2. Vegetation Removal and Its Hydrologic Consequences

Cattle selectively consume the grasses, forbs, and shrub seedlings that constitute the ground cover between desert shrubs. The consequences for water availability are multiple:

Reduced interception storage. Vegetation intercepts rainfall before it hits the soil, slowing its delivery and allowing more time for infiltration. Bare soil receives the full kinetic energy of raindrops, which compacts the surface further and promotes runoff — a self-reinforcing feedback loop.

Loss of root architecture. Grass roots in particular create extensive networks of fine channels in the soil through which water infiltrates and air circulates. When grasses are removed by overgrazing, these root channels disappear as roots die, reducing the soil's hydraulic conductivity — its ability to transmit water downward.

Increased bare soil evaporation. Vegetation shades the soil surface, reducing direct solar heating and evaporation. Bare soil loses moisture to evaporation much more rapidly than vegetated soil. In Luna County's hot, dry climate, bare soil can lose essentially all available soil moisture to evaporation within days of a rain event — water that under vegetated conditions might have slowly infiltrated to recharge the aquifer.

Shrub encroachment. This is a particularly well-documented consequence of overgrazing in the Chihuahuan Desert that has profound hydrologic implications. When grasses are removed by grazing, they no longer compete with woody shrubs for water and nutrients. Mesquite, creosote, tarbush, and other shrubs expand aggressively into formerly grass-dominated areas. This process — called shrub encroachment or desertification — has been extensively documented across Luna County and the broader Chihuahuan Desert over the past century and a half of Anglo-American ranching.

The hydrologic consequence of shrub encroachment is complex and somewhat counterintuitive. Shrubs concentrate water infiltration beneath their canopies — creating islands of relatively high infiltration surrounded by bare compacted intercanopy areas that shed water. This two-phase mosaic of resource concentration fundamentally changes how water moves across the landscape, reducing the uniform infiltration that characterizes healthy grassland and replacing it with a patchy system where most rainfall runs off the intercanopy areas and only a fraction is captured beneath shrub canopies.

Furthermore — connecting back to our earlier discussion — shrub encroachment by mesquite and other phreatophytes means more deep-rooted water consumers accessing the water table, increasing groundwater discharge through transpiration at the same time that surface infiltration and recharge are being reduced.

3. Streambank Degradation and Riparian Damage

Cattle congregate near water — rivers, streams, stock tanks, and springs — because water is the limiting resource in the desert. This congregation causes disproportionate damage in riparian zones, which are already among the most hydrologically critical areas in arid landscapes:

Bank trampling and erosion. Cattle hooves destabilize streambanks, causing them to collapse and erode. This widens and shallows stream channels, reducing their capacity to convey flood flows and paradoxically reducing infiltration into streambank alluvium — one of the primary recharge mechanisms for the Mimbres Basin.

Riparian vegetation removal. Cattle consume willows, cottonwood seedlings, and other riparian plants that stabilize banks and slow water movement. The loss of riparian vegetation dramatically accelerates bank erosion and reduces the capacity of stream corridors to retain water.

Water quality degradation. Cattle deposit manure directly in and adjacent to streams, introducing pathogens, nutrients, and organic matter that degrade water quality. In the Mimbres River corridor, which is one of the primary recharge pathways for the basin aquifer, this has direct implications for groundwater quality.

Spring damage. Springs — including small springs and seeps that may not be named or well documented — are particularly vulnerable. Cattle trample the spring margins, compact the soil, remove vegetation, and can physically alter the hydrology of the spring by destroying the surface expression of what was a productive recharge/discharge point.

4. Stock Tank Hydrology — A Complicated Legacy

Luna County's ranching landscape is dotted with stock tanks — earthen dams built across small drainages to capture runoff for livestock water. There are thousands of these structures across New Mexico's ranching counties. Their hydrologic effects are genuinely mixed:

On one hand, stock tanks capture runoff that would otherwise leave the basin quickly, allowing it to evaporate slowly or infiltrate locally — potentially contributing some recharge that wouldn't otherwise occur.

On the other hand, stock tanks concentrate cattle around the impoundment, maximizing the compaction, vegetation removal, and bank degradation impacts in precisely the areas — drainage channels — where infiltration and recharge are most productive. The net hydrologic effect of stock tanks on basin water budgets is debated among researchers.

5. Quantifying the Impact in the Mimbres Basin Context

Precise quantification of grazing impacts on Mimbres Basin recharge is difficult because the relevant studies haven't been done at that specific scale. But some context helps frame the magnitude:

We know that total estimated recharge to the US portion of the Mimbres Basin is approximately 35.6 million cubic meters per year — and that current withdrawals are roughly three times that amount. In that context, any reduction in recharge from grazing-induced compaction and vegetation loss represents a meaningful additional deficit in an already severely overdrawn system.

Research in comparable arid grassland systems in New Mexico and Arizona has documented recharge reductions of 20 to 50 percent on heavily grazed versus ungrazed or lightly grazed land. If even a fraction of that reduction applies to the Mimbres Basin's mountain-front and stream-channel recharge zones, the cumulative impact over 150 years of cattle ranching is substantial.