The Non-Financial Ledger: What the Paperwork Can’t Quantify

Picture a wheat field in Yuma County, Arizona, sitting in the Sonoran Desert heat in 2016. The field has no crop planted in it. It is fallow. The soil is resting. Then a truck arrives and spreads sewage sludge across it. Then another truck. Then another. Over three years, at least 26,104 tons of sewage sludge get applied to empty fields like this one at Desert Ridge alone, fields where nothing is growing and therefore nothing can absorb the nitrogen being dumped into the ground.

There is no crop waiting to soak up that nitrogen. There is only soil. And below the soil, hundreds of feet down, there are aquifers that communities across Arizona and southern California depend on for drinking water and irrigation. Those aquifers do not have filters that catch nitrogen. They absorb what percolates down from the surface. That is how groundwater works.

The communities living near these 26 farms didn’t get a vote. They weren’t sent a letter. Nobody knocked on their door and said: “We’re going to use the fields near your town as a disposal site for sewage sludge from Los Angeles-area treatment plants, and we’re going to do it without proper calculations, without soil testing, and without verifying whether any crop is even planted.” The municipalities in California that paid Denali got their sludge hauled away cheaply. The farms in Arizona and the Central Valley got paid for access to their land. The people living near the water tables beneath those farms got nothing except the risk.

In 2019, three years after the sludge spreading began at Desert Ridge, someone finally did soil sampling. The results confirmed what regulators had been worried about: nitrogen had already migrated below the root zone. It was already moving toward the aquifer. That is not a hypothetical harm. That is documented contamination in progress. The sampling happened because Arizona’s Department of Environmental Quality started asking questions after an inspection in August 2018. Arizona issued two Notices of Violation in 2018 and 2019. The federal government did not file its lawsuit until November 2024. Over five years passed between the state noticing the problem and the federal case being filed, all while Denali continued operating.

Denali sold its Arizona and California assets on August 22, 2024, three months before the federal complaint was filed. The company offloaded the operation once federal scrutiny reached a tipping point. The nitrogen already in the ground doesn’t go with it. The contamination stays. The people whose water supply may now carry elevated nitrate levels stay. The corporation leaves.

Nitrate in drinking water is regulated by the EPA precisely because high concentrations cause methemoglobinemia, also called “blue baby syndrome,” in infants, reducing blood oxygen levels. Agricultural communities, especially in Arizona’s Yuma and Maricopa counties, already face compounding pressures on groundwater from drought, overuse, and climate stress. Adding unregulated nitrogen loading on top of that is not a minor paperwork violation. It is a slow, invisible assault on a resource that cannot be easily replaced.

Legal Receipts: Straight From the Court Filing

Every quote below comes directly from the complaint filed by the U.S. Department of Justice in the U.S. District Court for the District of Arizona, Case No. 2:24-cv-03084-DWL, filed November 7, 2024.

“On numerous occasions between January 1, 2016 and August 22, 2024, Denali did not obtain or use reasonably site-specific information to determine how much sewage sludge could be applied at each field without exceeding the agronomic rate.” Complaint, Paragraph 40, U.S. v. Denali Water Solutions, LLC

• This is the core admission of the entire case. Denali was required by federal regulation to gather site-specific data before each application. The complaint confirms that for eight years across hundreds of fields, the company operated without that data.
• The phrase “numerous occasions” covers an eight-year window, 2016 through 2024, across 26 named farms and hundreds of individual fields. This is a systemic practice, not an isolated incident.

“Denali did not confirm that the crop anticipated to be planted was actually planted, or in fact that any crop was actually planted (i.e., that the field was not left fallow); did not obtain actual crop yield data from the Covered Farms; and instead used crop yields that were uniform and not consistent with publicly available data about average crop yields for the counties where the Covered Farms are located.” Complaint, Paragraph 40(a), U.S. v. Denali Water Solutions, LLC

• Denali wasn’t just skipping tests. The company fabricated inputs for its calculations, using uniform, invented crop yield numbers that weren’t grounded in public county-level data. This is the difference between lazy compliance and engineered deception.
• The most damaging implication: Denali never verified whether a field had a crop in it before applying sludge. That failure directly produced the fallow-field applications at Desert Ridge, which the complaint characterizes as “per se overapplication.”

“Denali did not conduct soil sampling at any of the Covered Farms to determine how much nitrogen was already present in the soil prior to Denali’s land application. As a result, Denali could not accurately determine how much nitrogen was already available for crop growth on any individual field prior to any application of sewage sludge.” Complaint, Paragraph 40(b), U.S. v. Denali Water Solutions, LLC

• Soil sampling is basic, standard practice for agricultural nitrogen management. The fact that Denali conducted zero soil testing across all 26 Covered Farms over eight years means the company was structurally incapable of legal compliance.
• “Any of the Covered Farms” is the critical phrase. This was a company-wide policy of non-testing, applied uniformly, not a field-by-field oversight.

“Sampling performed in 2019 at Desert Ridge – after years of land application by Denali using the methods described above – documented elevated levels of nitrogen at depths below the root zone, indicating that excess nitrogen had been applied to the surface and had migrated downward.” Complaint, Paragraph 42, U.S. v. Denali Water Solutions, LLC

• This is the physical evidence of harm. The complaint does not allege that harm was possible or speculative. It states that nitrogen had already migrated below the root zone at Desert Ridge by the time testing occurred in 2019.
• Nitrogen below the root zone is nitrogen heading toward the aquifer. It cannot be recalled. The contamination was ongoing at the time this sentence was written into a federal complaint in November 2024.

“The agronomic rate for a fallow field is zero. If no crops are being grown there is no nitrogen needed to grow a crop, and hence no need for any nitrogen from sludge application.” Complaint, Paragraph 46, U.S. v. Denali Water Solutions, LLC

• Federal lawyers wrote this in plain language on purpose. The rule is as simple as it gets: if nothing is growing, the legal limit is zero. Denali spread at least 26,104 tons onto fallow fields at Desert Ridge across 2016, 2017, and 2018.
• This specific violation earns its own “claim for relief” in the complaint. The DOJ is treating fallow-field applications as a distinct category of unlawful dumping, separate from the broader agronomic-rate violations at all Covered Farms.

By the Numbers: How Much Sludge, Where, and When

Between 2016 and 2023, Denali applied at least 295,991 tons of sewage sludge to farms beyond Desert Ridge, plus at least 96,093 tons at Desert Ridge alone. The chart below shows annual application volumes at non-Desert Ridge covered farms.

What the Rules Required vs. What Denali Actually Did

Federal regulations under 40 C.F.R. Part 503 are specific about what a land applier of sewage sludge must do before every application. The complaint documents how Denali’s actual practice diverged from every single requirement.

Societal Impact Mapping: Who Gets Hurt

Environmental Degradation

The documented and alleged environmental harms in this case are specific, measurable, and ongoing.

• Nitrogen has been confirmed at depths below the root zone at Desert Ridge Farms in Yuma County, Arizona, as of 2019 sampling. Below the root zone, crops cannot absorb nitrogen; it continues migrating downward toward the underlying groundwater aquifer.
• Denali applied at least 26,104 tons of sewage sludge to fallow fields at Desert Ridge between 2016 and 2018. Fallow fields have zero crop-uptake capacity, meaning every gram of nitrogen applied to those fields had nowhere to go except down into the soil and eventually the aquifer.
• The company used non-site-specific volatilization and mineralization rates across all 26 Covered Farms in three Arizona counties and three California counties. These are regions with distinct soil compositions, climates, and water table depths. A one-size-fits-all calculation in this context systematically underestimates nitrogen loading.
• No post-application soil sampling was conducted at any Covered Farm during the entire 8-year operation. Without this data, contamination events at any of the 26 farms remain undetected and unquantified.
• Total documented sludge applied across the operation: at least 392,084 tons across hundreds of individual fields in six counties, with no verified compliance at any individual application site.

Public Health

Nitrate contamination of groundwater carries direct, documented risks to human health, and agricultural communities in the Southwest face compounding vulnerability.

• Nitrate-contaminated drinking water causes methemoglobinemia in infants under six months, a condition that reduces the blood’s ability to carry oxygen. The EPA enforces a Maximum Contaminant Level (MCL) of 10 mg/L nitrate-nitrogen in drinking water for this reason. Excess nitrogen from over-applied sludge is a primary contributor to this contamination pathway.
• Maricopa, Pinal, and Yuma Counties in Arizona are heavily agricultural regions where groundwater serves as a primary drinking water source for rural residents and farm communities. These same communities have the least financial or legal capacity to test, treat, or litigate contaminated water supplies.
• Arizona’s Department of Environmental Quality issued Notices of Violation in September 2018 and February 2019. Despite that state-level action, federal enforcement did not arrive until November 2024. The six-year gap between state notice and federal complaint represents six years during which residents near the Covered Farms had no guarantee of any corrective action.
• Nitrate exposure in adults is associated with increased risk of certain cancers, including colorectal cancer, according to peer-reviewed research. Long-term low-level exposure via groundwater is a documented concern in agricultural communities with intensive nitrogen applications.

Economic Inequality

The structure of this operation transferred costs from wealthy municipalities to communities that didn’t consent to the arrangement and may not even know it exists.

• Approximately 22 California municipalities paid Denali to haul away their sewage sludge. Those municipalities got a disposal service. The environmental liability, groundwater risk, and any future remediation costs fall on the land and communities in Arizona and the Central Valley of California where the sludge was deposited.
• Rural agricultural communities in Yuma, Pinal, and Maricopa Counties, many of which include significant Latino and farmworker populations, are among the most politically and economically marginalized in the Southwest. They have the least access to legal representation and the least leverage over multi-state corporate operators registered in Delaware and headquartered in Arkansas.
• The maximum civil penalty under the Clean Water Act is $66,712 per day per violation. If violations occurred on hundreds of fields over hundreds of days across an 8-year window, the theoretical maximum penalty dwarfs the actual cost of contaminating an aquifer that communities depend on. Corporate operators making rational cost-benefit calculations may treat these penalties as a cost of doing business, not a deterrent.
• Denali sold its Arizona and California assets on August 22, 2024, three months before the federal complaint was filed. Asset sales can complicate enforcement and collection of penalties. Any financial liability remaining with Denali may not transfer to the entity that now operates the same contracts and fields.
• There is no record in the source document of any structured remediation program, groundwater testing commitment, or compensation mechanism for affected communities. The only requested relief is civil penalties paid to the federal government.

The “Cost of a Life” Metric

The federal government put a number on what this kind of violation is worth. Here’s what that number means in context.

What Now? Who to Pressure and What to Do

This case is in the U.S. District Court for the District of Arizona. The federal complaint has been filed. That is not the end of the story; it is the beginning of a legal process that communities can watch, document, and push to see through to its full consequences.

Key Parties Named in the Record

• Danica Anderson Glaser, Senior Counsel, Environmental Enforcement Section, Environment and Natural Resources Division, U.S. Department of Justice. Email: danica.glaser@usdoj.gov. Phone: 202-514-5270. She is the lead attorney for the government in this case.
• Todd Kim, Assistant Attorney General, Environment and Natural Resources Division, U.S. Department of Justice. Supervising the litigation.
• Gary M. Restaino, U.S. Attorney for the District of Arizona. The complaint was filed in his district.
• Kasey Barton, Senior Attorney, Office of Regional Counsel, EPA Region 7, 11201 Renner Boulevard, Lenexa, KS 66219. EPA counsel advising on this case.
• Denali Water Solutions, LLC. Incorporated in Delaware. Principal place of business in Arkansas. Corporate leadership names are [REDACTED – Not in Source]. Contact and accountability requests should be directed through the company’s registered agent in Delaware.

Watchlist: Regulatory Bodies With Jurisdiction

• U.S. Environmental Protection Agency (EPA), Region 9: Covers Arizona and California. The agency bringing this enforcement action. Public can submit tips and complaints at epa.gov/enforcement/report-environmental-violations.
• Arizona Department of Environmental Quality (ADEQ): Already issued Notices of Violation. Their biosolids program is the first line of state enforcement. adeq.az.gov.
• U.S. Department of Justice, Environment and Natural Resources Division: The litigating body. Case filings are public record at PACER, the federal courts online record system.
• California State Water Resources Control Board: Oversees water quality in California counties where sludge was applied (Madera, Merced, Riverside).
• U.S. District Court, District of Arizona: Case No. 2:24-cv-03084-DWL. All filings are public and searchable via PACER (pacer.gov).

What Communities Near the Covered Farms Can Do

• Request well testing now. If you live near any of the 26 Covered Farms listed in Appendix A of the complaint, particularly in Yuma, Maricopa, or Pinal County, contact ADEQ and request nitrate testing of your water supply. You have the right to know.
• Organize with neighboring farms and rural water co-ops. The 26 farms named in this complaint are in the same counties. Neighboring landowners and water users share the same aquifer. Collective legal standing and collective political pressure are stronger than individual complaints.
• Contact your County Supervisor. Maricopa, Pinal, and Yuma County supervisors have authority over local land use and can advocate with state agencies for expanded groundwater monitoring near the Covered Farms.
• Track the settlement or judgment. When this case resolves, watch whether the penalty reflects the scale of the harm or whether it is reduced to a fraction of the maximum. Public comments can be submitted during DOJ consent decree review periods.
• Support mutual aid networks in agricultural communities. Organizations providing water quality advocacy and legal aid in Arizona’s agricultural counties include Earthjustice’s Southwest office and the Southwest Environmental Center. They can provide information about your rights and connect you with legal resources if your water supply is affected.