Is Monticello, IA tap water safe?
The short answer
1 of the 3 utilities serving Monticello has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Iowa’s records: Montipark LLC.
Monticello Water Supply, which serves the most people here, has 2 results above the health goal. The worst: Lead at 3.0 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Monticello’s ZIP codes, from EPA’s estimates.
- Open report
Monticello Water Supply
Iowa · serves 4,040 people · about 140 in Monticello
2 results above the health goal. The worst: Lead at 3.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Bacon Addition
Iowa · serves 81 people · under 100 in Monticello
1 result above the health goal. The worst: Lead at 2.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Montipark LLC
Iowa · serves 60 people · lists Monticello among the places it serves
1 result above the health goal. The worst: Lead at 7.0 ppb, above the health goal.
2 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Monticello Water Supply’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, Arsenic
Water testing near Monticello
The 3 labs Iowa certifies closest to Monticello, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
ChemRight Laboratories
Maquoketa, IA · about 27 miles
Certified for bacteria, nitrate, minerals and other inorganics
Linn County Public Health Department
Cedar Rapids, IA · about 29 miles
Certified for bacteria, nitrate
Dubuque County Health Department
Dubuque, IA · about 30 miles
Certified for bacteria
State Hygienic Laboratory at the University of Iowa: Through the Grants-to-Counties program, private well owners in participating counties can have their water tested for total coliform bacteria and nitrate. Start with the county sanitarian at your county health department. No cost in a participating county. The Grants-to-Counties Program, State Hygienic Lab at the University of Iowa.
All 36 certified labs for IowaZIP codes in Monticello
Which ZIP codes are in Monticello: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Iowa DNR, laboratories certified for drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Monticello
Towns nearby with a page of their own.
What to do next
- Read Monticello Water Supply’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for LeadRanked by certification and what they cost over five years.The best water filters for lead, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water