Nitrate In Drinking Water In Florida
What residents of Florida need to know about nitrate in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, Florida Department of Environmental Protection (FDEP), CDC · Last reviewed: 2025-01-01
Quick Answer
Is nitrate in drinking water a real concern in Florida?
Yes — Florida's karst limestone geology allows rapid movement of surface nitrate into groundwater, and the state has the highest number of septic systems of any U.S. state.
Is this mostly a public-water issue, a private-well issue, or both?
Both — private well users in agricultural and high-septic-density areas are at elevated risk; some public systems drawing from shallow aquifers have also documented nitrate issues.
What is the main reason residents should care?
Florida's geology (thin sandy soils over porous karst limestone) allows nitrate from fertilizer, septic systems, and animal waste to move rapidly into groundwater. Florida has more than 2.7 million households on septic systems, adding to nitrate loading across the state.
Key Facts
| EPA Nitrate MCL | 10 mg/L as N |
| Septic systems in FL | 2.7 million+ — highest number of any U.S. state |
| Geology risk factor | Karst limestone allows rapid nitrate percolation to groundwater |
| Agricultural source | Lake Okeechobee region: sugarcane, citrus, beef cattle operations |
| State oversight | FDEP and five Water Management Districts |
Why This Matters in Florida
Florida is uniquely vulnerable to nitrate contamination because of its geology. Thin sandy soils and porous karst limestone provide little natural filtration as rainwater and surface runoff travel to groundwater. Florida also has the largest number of septic systems of any state in the country — more than 2.7 million — each contributing organic nitrogen and nitrate to the surrounding soil and groundwater. Agricultural areas around Lake Okeechobee (sugarcane, citrus, beef cattle) and North Florida farming regions (row crops, poultry) generate significant nitrate loading. FDEP and Florida's five Water Management Districts monitor nitrate in surface and groundwater.
Critical — Infants Under 6 Months
Do not use tap water that exceeds 10 mg/L nitrate-nitrogen to prepare infant formula or feed infants under six months. Boiling will concentrate nitrate — do not boil. Use bottled water or a certified reverse osmosis system (NSF/ANSI 58) until the issue is resolved.
Florida Utilities With Nitrate Violation Records
The utilities listed below have at least one nitrate violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
City of Tampa Water Department
Tampa · 733,886 served
Orlando Utilities Commission
Orlando · 536,466 served
City of St Petersburg
Odessa · 349,979 served
City of Cocoa
Cocoa · 294,039 served
Sarasota Co Special Util Dist
Sarasota · 272,267 served
Emerald Coast Utilities Authority (ecua)
Pensacola · 242,172 served
Port St Lucie Utilities
Port St Lucie · 224,485 served
Collier County Regional Wtp
Naples · 216,993 served
Pcud-pasco County Regional Pws
New Port Richey · 214,403 served
Gru - Murphree Wtp
Gainesville · 195,681 served
How Nitrate Gets Into Drinking Water
Agricultural fertilizer and manure runoff
Nitrogen-based fertilizers and animal waste applied to Florida cropland can leach into groundwater or run off into surface water supplies. This is the dominant nitrate pathway in most agricultural regions.
Septic system effluent
Failing or poorly sited septic systems release nitrogen-rich wastewater near drinking water wells. Rural areas with high well density and aging septic infrastructure face elevated risk.
Concentrated animal feeding operations (CAFOs)
Large livestock facilities generate significant waste. Lagoon leaks and overapplication of manure to nearby fields can create localized nitrate hotspots in groundwater.
Natural geological deposits
In some regions, naturally occurring nitrogen compounds in soil and bedrock contribute background nitrate levels to groundwater independent of agricultural activity.
Who Should Pay Closest Attention
Households with infants relying on private wells in agricultural or rural Florida counties face the highest risk. Residents in areas with high septic density and sandy soils should consider annual well testing for nitrate.
Households with infants under six months
Pregnant residents
Private well owners in agricultural areas
Households near livestock operations or CAFOs
Rural residents on shallow groundwater wells
Households with older or failing septic systems nearby
How to Check Your Situation in Florida
- 1
Identify your water utility. Use the ZIP lookup below or browse the Florida utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open nitrate violations.
- 3
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website. It must disclose any MCL exceedances.
- 4
If you are on a private well, arrange testing at a Florida Department of Environmental Protection (FDEP)-certified lab. Your state health department maintains a list of certified labs. Annual testing is recommended in agricultural areas.
- 5
If you have an infant under six months, use bottled water or a certified RO system (NSF/ANSI 58) immediately as a precautionary measure — do not wait for test results if you are in a high-risk area.
- 6
If your utility issues a nitrate exceedance notice, follow their guidance and do not use tap water for infants until the issue is resolved.
Treatment Options
Carbon filters and boiling do not remove nitrate. Only the options below are effective.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to NSF/ANSI 58 reduce nitrate by 85–95% at the point of use. Under-sink installation required. The most practical residential option for nitrate concerns.
Distillation
Distillation units effectively remove nitrate along with most other dissolved contaminants. Suitable for drinking and cooking water — not whole-house use.
Anion Exchange
Ion exchange systems designed for nitrate removal exchange nitrate ions for chloride on a resin bed. Effective as a point-of-entry system; requires periodic regeneration and monitoring.
Carbon filters do NOT remove nitrate
Standard pitcher filters, faucet filters, and under-sink carbon units — including those certified NSF/ANSI 42 or 53 — do not remove nitrate. Do not use these for nitrate reduction.
Frequently Asked Questions
Related Pages
Nitrate — National Overview
All U.S. utilities with nitrate records
Florida State Overview
All utilities and water quality data
Lead in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 85–95% of nitrate
Well Water Guide
Private well testing and safety
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
Find Your Utility
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Florida Department of Environmental Protection (FDEP) ↗