Nitrate has no color, no odor, and no taste. A glass of water at 12 milligrams per liter looks exactly like a glass at 2. In eight counties in the southeast corner of this state — Dodge, Fillmore, Goodhue, Houston, Mower, Olmsted, Wabasha, and Winona — about 93,805 people draw their drinking water from a private well, and nobody in the world tests that well unless the owner sends in a sample.
I read rules for a living. This one has a design flaw you can see from the text.
The promise the state made in 1989
Minn. Stat. § 103H.001 is four sentences long and it is titled DEGRADATION PREVENTION GOAL. Here is the whole thing:
It is the goal of the state that groundwater be maintained in its natural condition, free from any degradation caused by human activities. It is recognized that for some human activities this degradation prevention goal cannot be practicably achieved. However, where prevention is practicable, it is intended that it be achieved. Where it is not currently practicable, the development of methods and technology that will make prevention practicable is encouraged.
That has been the law since 1989 and has never been amended. Read the second sentence as carefully as the first — the Legislature built the escape hatch and the goal into the same paragraph.
The definitions section, § 103H.005, sets the machinery. "Best management practices" means "practicable voluntary practices" — subdivision 4, emphasis mine. A "pollutant" is a chemical for which a health risk limit has been adopted. Nitrate qualifies: the Department of Health set the limit for nitrate as nitrogen at 10,000 micrograms per liter — 10 mg/L — at Minn. R. 4717.7860, subp. 13, and labeled it MCL-based. The federal maximum contaminant level behind it is 10 mg/L as nitrogen, 40 C.F.R. § 141.62(b)(7).
The ladder, and the rung the escalator starts on
The chapter builds a real ladder. Under § 103H.251, when a pollutant shows up and conditions suggest a "common detection," the commissioner of agriculture must begin developing best management practices. Section 103H.275 goes further: if those practices have "proven to be ineffective," the commissioner may adopt water resource protection requirements by rule, and violating one carries the penalties for violating a rule under chapter 18D. Voluntary, then mandatory, with teeth at the end.
Minnesota climbed that ladder. The Groundwater Protection Rule, Minn. R. ch. 1573, took effect June 28, 2019, in two halves.
The first half is flat prohibitions that run by geography. Part 1573.0030 bars fall application of nitrogen fertilizer on cropland in a quarter section that is 50 percent or more vulnerable groundwater area, and bars application to frozen soil there. Karst country is vulnerable groundwater area, so those rules reach it.
The second half is the escalator, and it is wired somewhere else. Part 1573.0040 tells the commissioner to evaluate nitrate concentrations "in groundwater from public wells in drinking water supply management areas" to set mitigation levels, and the criteria at every rung reference "the public well." Part 1573.0050 issues an enforceable order only to parties in mitigation level 3 and 4 areas, and one factor in deciding which orders to write first is "the size of the population at risk receiving water from the public well."
Private wells do not move that escalator. In the karst, private wells are where the people are.
The rule also writes its own clock: no evaluation of whether practices took hold "for at least three growing seasons" after publishing them, and review of a level 2 designation "after no fewer than three growing seasons or the lag time, whichever is longer."
The petition, and precisely what EPA did
On April 24, 2023, eleven organizations led by the Minnesota Center for Environmental Advocacy — the full roster is in the sources below — petitioned EPA for emergency action under section 1431 of the Safe Drinking Water Act, 42 U.S.C. § 300i. Carly Griffith and Leigh Currie of MCEA signed it, addressed to Administrator Michael Regan and Region 5 Administrator Debra Shore.
Two requests matter most. It asked EPA to order the parties responsible for the contamination to supply free water testing and a free source of clean drinking water. And it asked EPA to "Prohibit CAFOs from opening, expanding, or modifying operations in the karst region unless and until nitrate concentrations in wells with historically high levels of nitrate consistently fall below the MCL of 10 mg/L."
On November 3, 2023, Shore wrote back — to Minnesota's three agency commissioners, not to the petitioners' targets. EPA determined further action was needed and requested a coordinated work plan: identify every residence on a private well, give notice in all applicable languages, test on request, offer alternate water at no cost to the resident, publish records so the public can measure progress, and report quarterly. Reply within 30 days.
What EPA did not do is the part people get wrong. It did not issue a section 1431 emergency order, and it did not order a CAFO moratorium — the November 3 letter contains no such directive. It reserved the power instead, writing that EPA "will continue to closely monitor this situation and consider exercising our independent emergency and enforcement authorities." Nearly three years on, the state agency on the receiving end says flatly what became of that reservation: in the Request for Comments opening its own feedlot rulemaking, the Minnesota Pollution Control Agency writes that "EPA did not, and has not," used those authorities.
There is a fourth act I cannot document, so I will not narrate one. EPA's own Southeast Minnesota Groundwater page, last updated April 17, 2026, still presents the November 3, 2023 letter as the agency's action, and I found no EPA document granting, denying, or withdrawing the petition. On July 17, 2025, Rep. Brad Finstad asked Administrator Lee Zeldin and Region 5 Administrator Anne Vogel to rescind EPA's acceptance of the petition and withdraw the November 2023 letter. I could not find EPA's answer. Treat the petition's status as open, because on the public record it is.
Finstad's argument belongs in his own words. He wrote that "Southern Minnesota farmers, in partnership with state agencies, have long demonstrated a commitment to protecting their natural resources," and that over 70 years American farmers "increased their production output by 175 percent while using fewer inputs, including land, water, and fertilizer" — "not because the government told them to." He also made a factual point that checks out in part: MPCA reissued its general feedlot permits and opened a chapter 7020 rulemaking. MPCA's own request for comments on that rulemaking recites the November 3, 2023 letter among the reasons the rulemaking started; I could not confirm the same for the reissued permits. On the rulemaking, that letter is load-bearing, and he is right that it is.
What the state's own numbers say
The 2024 Legislature paid for the response. Laws 2024, ch. 106, art. 2, § 7(b) appropriated $2,790,000 from the Clean Water Fund for "managing a voluntary program" in the eight named counties — well inventory, nitrate testing, outreach, and a dashboard — available until June 30, 2027. In planning it, MDH estimated roughly 36,000 private well households in the region and budgeted $50 per test.
Here is where it stands, from the agencies' own quarterly report to EPA for January through March 2026:
- 4,243 households have requested a free test kit since the response began. 2,327 returned them — a 55 percent return rate.
- Of those 2,327 wells, 153 came back at or above 10 mg/L — about 7 percent. That is the denominator that matters: 153 out of 2,327 tested, not out of 36,000 households.
- MDH's own target is 20 percent of private-well households tested in the first two years. Against its ~36,000 estimate, 2,327 is about 6 percent.
- 263 reverse osmosis systems have been installed, at no cost, as of March 31, 2026. A year earlier the count was 164.
- The well inventory has located 2,499 of an estimated 9,516 wells missing from the County Well Index.
- Every post-treatment nitrate sample, including at 118 one-year maintenance visits, has come back below 10 mg/L. The treatment works.
EPA's letter estimated 9,218 residents were or still are at risk of drinking water at or above the MCL, drawn from MDA's Township Testing Program reports for 2014–2019, which found 12.1 percent of private wells tested in the region over the MCL — 1,058 wells. That estimate counts people. The 263 counts households. I am not going to divide one by the other, and neither should anyone quoting this piece.
The concession, and it is a real one
Farmers did not create this alone and cannot fix it alone.
Nitrate moves through fractured carbonate bedrock on a schedule no legislature set. Minnesota's own rule concedes it: "lag time" is an operative defined term in Minn. R. ch. 1573, sitting inside the review provisions because the drafters knew the water would arrive years after the decision that loaded it.
Look at what the state found in Houston County. MDA staff met with about 30 producers in five high-nitrate townships, and the obstacle was not willingness. Producers using manure "were having a difficult time with proper crediting due to lack of manure storage infrastructure," and those lacking proper crediting "were less likely to have adequate manure storage." That is a capital problem on a thin-margin balance sheet. About 15 of those 30 showed interest in financial help to build or improve storage. Two Local Advisory Team meetings ran in Spring Grove, the tailored practices for two townships were slated for publication over this past summer, and adoption is set to begin in the 2027 growing season. Two townships, in one county, starting next year.
The sixteen people who wrote Minnesota's long-term recommendations were residents and local leaders from those eight counties, farmers among them. Their July 2025 report attaches a note to its toughest recommendation: it "is not to penalize farmers who are making sound nitrogen application decisions, reduce the economic viability of businesses, or reduce the ability of farmers to adapt to challenges and variability."
A farmer who does everything right this year is still drinking decisions made before the rule existed. No statute can hurry the water.
What we can do
Reinstate the Township Testing Program. It ran 2013–2019 and stopped. Its county reports produced the 12.1 percent figure EPA leaned on in 2023, and nothing comparable has replaced it. The work group asked for this by name.
Untie the escalator from public wells. Section 103H.275 speaks of "groundwater pollution" and lets the commissioner designate affected areas by order. Nothing in the statute requires the trigger be a municipal well — that choice was made in Minn. R. 1573.0040, and MDA can amend it so private-well results inside a mapped vulnerable groundwater area move a mitigation level.
Fund manure storage at the size of the actual ask. BWSR received $850,000 in 2024 for manure management across an eleven-district service area. In five townships in one county, half the producers MDA sat down with wanted storage help. Size the program to the demand the agencies already measured.
Finish the inventory and buy the tests. 2,499 wells located out of 9,516; tests cost $50; the appropriation runs to June 30, 2027. Unspent authority protects nobody's kid.
Publish the dashboard. The January 2024 work plan put it in the fourth quarter of 2024. The January–March 2026 report still calls it "in development." EPA asked for public records precisely so residents could measure the state against its own promises. Twenty-six months is long enough.
Minnesota wrote down the right goal in 1989, then built the enforcement trigger where the fewest at-risk people live. The water under the karst does not care which well the rule is watching.
First the facts. Then the fix.
Sources
Minn. Stat. §§ 103H.001, 103H.005, 103H.151, 103H.175, 103H.201, 103H.251, and 103H.275 were pulled as raw text from revisor.mn.gov and read in full, including History lines; § 103H.001 traces to 1989 c 326 art 1 s 1 with no subsequent amendment, and the four-sentence goal above is quoted complete and verbatim. The "practicable voluntary practices" definition is § 103H.005, subd. 4; the pollutant and pollution definitions are subds. 11 and 12; the ineffectiveness trigger and the chapter 18D penalty are § 103H.275, subds. 1(b) and 2(f). The Groundwater Protection Rule, Minn. R. ch. 1573, was read at parts 1573.0030 (statewide fall-application and frozen-soil prohibitions, keyed to vulnerable groundwater areas by quarter section), 1573.0040 (mitigation level designations from public well data; the three-growing-season evaluation and review windows at subps. 6 and 7), and 1573.0050 (orders only to mitigation level 3 and 4 areas; the prioritization factor referencing population served by the public well). Minnesota's health risk limit for nitrate as nitrogen — 10,000 µg/L, MCL-based, adopted 2009 — is Minn. R. 4717.7860, subp. 13. The federal maximum contaminant level of 10 mg/L as nitrogen was read from the current eCFR text of 40 C.F.R. § 141.62(b)(7).
The petition was read in the original 98-page PDF hosted by the Minnesota Center for Environmental Advocacy and linked from EPA's own page: cover page dated April 24, 2023, addressed to Administrator Michael Regan and Regional Administrator Debra Shore, signed by Carly Griffith and Leigh Currie; the requested relief at pages 32–33 supplies the free-water and CAFO-prohibition asks quoted here. The eleven petitioners, as listed on the petition's cover page and again in footnote 1 of EPA's response, are the Minnesota Center for Environmental Advocacy, the Environmental Working Group, the Minnesota Well Owners Organization, the Center for Food Safety, Clean Up the River Environment, Food & Water Watch, Friends of the Mississippi River, the Izaak Walton League Minnesota Division, the Land Stewardship Project, Minnesota Trout Unlimited, and the Mitchell Hamline Public Health Law Center. EPA's response was read in the signed PDF on epa.gov — a seven-page letter to Commissioners Cunningham, Peterson, and Kessler, digitally signed by Regional Administrator Debra Shore on November 3, 2023 — which supplies the population figures (390,682 residents, ~300,000 on 93 public water systems, ~93,805 on private wells, 9,218 estimated at or above the MCL, 12.1 percent and 1,058 wells from Township Testing), the seven work plan elements, the 30-day deadline, and the sentence reserving EPA's independent emergency and enforcement authorities. EPA's "Southeast Minnesota Groundwater" page, last updated April 17, 2026, is the source for the statement that the November 3, 2023 letter remains the agency's stated action.
The state-side record comes from primary agency documents: the January 12, 2024 "Work Plan: Addressing Nitrate in Southeast Minnesota" (MDH/MDA/MPCA) for the three phases and the dashboard commitment; the April–June 2024 quarterly update for the appropriation table and the ~36,000-household and $50-per-test planning figures; and the January–March 2026 quarterly update, published May 6, 2026, for every current number in this piece — 4,243 requests, 2,327 returns, 55 percent return rate, 153 wells at or above 10 mg/L, the 20 percent two-year goal, 263 reverse osmosis installations, 164 as of March 31, 2025, 118 maintenance visits with all post-treatment samples below 10 mg/L, 2,499 of 9,516 inventoried wells, the Houston County producer meetings and manure-storage findings, the 2027 adoption timeline, the BWSR $850,000 manure management appropriation, the reissued SDS and NPDES feedlot permits, and the chapter 7020 rulemaking. The appropriation language was confirmed against the session law itself, Laws 2024, ch. 106, art. 2, § 7(b), on revisor.mn.gov. The July 2025 "Southeast Minnesota Nitrate Strategies Collaborative Work Group: Report of Recommendations" (MPCA document wq-gen1-19) supplies the Township Testing reinstatement request, the quoted note to Recommendation 3h, and the work group's sixteen named local members. That MPCA's chapter 7020 rulemaking rests in part on the EPA letter was confirmed not in the quarterly report but in MPCA's own Request for Comments for that rulemaking (wq-rule4-29a), which recites receiving "a letter from the U.S. Environmental Protection Agency (EPA) on November 3, 2023" — a third primary confirmation of that date — and which also states that "EPA did not, and has not," used its emergency and enforcement authorities. Rep. Brad Finstad's July 17, 2025 letter is quoted from the full text his own office published at finstad.house.gov, addressed to Administrator Lee Zeldin and Regional Administrator Anne Vogel.
This one runs long — the sequence from a 1989 statute to a 2019 rule to a 2023 federal petition to the state's March 2026 numbers could not be shortened without dropping a verified link, and a half-told sequence is how this story usually goes wrong. Four limits. First, the status of the petition: I found no EPA document formally granting, denying, or withdrawing it, and no EPA reply to Rep. Finstad's July 2025 rescission request — the status is described here as open because that is what the public record supports, not because I confirmed it is pending. Second, the 12.1 percent and 1,058-well figures are quoted as EPA's November 2023 letter states them, sourced there to MDA Township Testing county reports for 2014–2019; those county reports were not read for this piece, so that denominator is EPA's, not one I verified. Third, the Houston County practices were reported in May 2026 as due for publication over the summer; I did not confirm they were published on schedule. Fourth, MPCA's published statement that more than 70 percent of nitrate in Minnesota waters comes from cropland was read on MPCA's page but the underlying assessment was not, so no figure above rests on it. Corrections: campaign@madgettformn.com.