Skip to main content
WaterVerge

Water quality report · updated Jul 2026

Is Ocklawaha, MO Tap Water Safe to Drink?

Graded A-, with 8 unresolved violations on record. See what was cited — and what it means for your tap. What to do ↓

0 contaminants over a legal limit
0.0 ppb lead, 90th percentile · low
8 unresolved violations
965 people served by 2 water systems

PWSID FL3420939 · moderate data confidence · public/private utility

Reviewed by WaterVerge Editorial Team · Last updated July 2026
A 85.3 / 100

#215 of 487Missouri cities
How we grade →

01The verdict: is Ocklawaha water safe?

Ocklawaha's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (85.3/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 965 residents using groundwater (wells).

The concern

8 unresolved violations on record

EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.

See what was cited ↓
The good news

Lead is well under the limit

90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.

See the trend ↓
Keep watching

5 violations in the last five years

Recent compliance history is the best predictor of future problems — the year-by-year record is below.

See the record ↓

Ocklawaha's drinking water received a grade of A- (85.3 out of 100), indicating good water quality. The city's 2 water systems serve approximately 965 residents using groundwater.

Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 40 violations on record, including 0 health-based violations. 8 remain unresolved.

Ocklawaha ranks #215 out of 487 cities in Missouri for water quality, placing it mid-range in the state. Ocklawaha relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff. As a small community water system, Ocklawaha may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.

How the 85.3/100 breaks down Methodology →
ViolationsHistorical violation record including health-based and monitoring violations.
35.3 / 45B
Lead & CopperLead at 0.0 ppb (90th percentile).
20 / 20A
ContaminantsPFAS + legacy contaminant analysis.
17 / 20B
ComplianceMonitoring and reporting compliance with EPA regulations.
8 / 10B
Source RiskWater source: Groundwater.
5 / 5A

02What's in Ocklawaha's water

Every contaminant flagged in Ocklawaha, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.

1 detection · sorted by % of legal limit
Over the limit Elevated — watch Within limits
0 50% LEGAL LIMIT 150%
1 contaminant tested under EPA SDWIS, LCR and UCMR programs · 1 detected · not yet tested for PFAS under UCMR 5

Full contaminants report

Contaminant Detected Level EPA Limit Unit Category Status
Lead (90th percentile) 0.0 15 ppb Inorganic Safe
Data source: EPA SDWIS, UCMR 5, local utility CCR.

03Ocklawaha's ten-year track record

Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 40 violations on record, including 0 health-based violations. 8 remain unresolved.

6 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.

7 monitoring & paperwork 1 still unresolved
UpdateWater quality data updatedLatest EPA compliance and testing data incorporated into Ocklawaha's water quality assessment. Grade: A- (85.3/100).
Violation1 drinking water violation recordedContaminants: E. COLI.Resolved
Violation1 drinking water violation recordedContaminants: Lead and Copper Rule.Open
Violation2 drinking water violations recordedContaminants: Total Haloacetic Acids (HAA5), TTHM.Resolved
Lead, 90th percentileppb · lower is better
01020304050EPA action level · 15 ppb1993 — 5 ppb1994 — 3 ppb1995 — 2 ppb1996 — 2.5 ppb1999 — 3.5 ppb2003 — 2 ppb2006 — 37 ppb2007 — 2.5 ppb2008 — 7.9 ppb2009 — 4.1 ppb2012 — 0.80 ppb2015 — 0 ppb2018 — 1.8 ppb2021 — 2.2 ppb2024 — 18 ppb2025 — 0 ppb5019931999200820182025

Down 5 ppb since 1993. Latest reading: 0 ppb (2025) — 0% of the action level. Sampled at higher-risk homes (90th percentile).

04Where Ocklawaha's water comes from

Ocklawaha's drinking water is drawn from underground aquifers through wells.

Source

Groundwater

Underground aquifers reached by wells — naturally filtered, but can carry minerals like arsenic and nitrate.

Treatment

Local treatment

Groundwater generally needs less treatment — typically disinfection and, where needed, mineral removal.

Distribution

2 systems

2 water systems, operated under public/private ownership.

Delivery

965 people

Residents served across Ocklawaha's service area.

Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals. Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds. The system is operated by public/private ownership and serves approximately 965 people through 2 water systems.

System namePWSIDPopulationSource
OCKLAWAHA WATER WORKS (2 WTPS) FL3420939 965 Groundwater
WINDING WATERS FL3424691 608 Groundwater

Water bodies near Ocklawaha

Creve Coeur Creek At Chesterfield · river Creve Coeur Creek Near Creve Coeur · river Fee Fee Creek Near Bridgeton · river River Des Peres Near University City · river River Des Peres Tributary At Pagedale · river

These water bodies shape the regional watershed and can indirectly affect groundwater quality.

05How Ocklawaha compares

Scores for nearby Missouri cities on one line, with the average marked.

Ocklawaha (this city)
85.3 · A-
Kansas City
79.2 · B
Chesterfield
74.8 · B-
Columbia
61.4 · C
O Fallon
43.4 · F
Springfield
37.1 · F

dashed line = Missouri average (67/100)

Ocklawaha scores 85.3/100above the Missouri average of 67/100. It outscores 8 of 10 nearby cities. Full Missouri rankings →

Marion water quality rankings
Compare all cities in the county — grades, violations, and contaminant data side by side.

06What to do at home

Steps matched to what testing actually found in Ocklawaha's water — not generic advice.

Extra protection

A basic carbon filter still helps

Ocklawaha's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.

Compare tested filters →
Know your report

Read your utility's annual report

Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.

How to read a CCR →
Stay informed

Watch for Ocklawaha alerts

We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.

All water alerts →

Frequently asked questions

Is Ocklawaha, MO tap water safe to drink?

Ocklawaha's water quality earned a grade of A- (85.3/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #215 out of 487 cities tested in Missouri.

What contaminants are in Ocklawaha's water?

Lead was measured at 0.0 ppb (90th percentile). 40 violations are on record.

How is Ocklawaha's water quality grade calculated?

The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.

Do I need a water filter in Ocklawaha?

Based on current data, basic filtration should suffice for additional peace of mind.

Where does Ocklawaha's water come from?

Ocklawaha's water is sourced from Groundwater. The city has 2 water systems serving approximately 965 residents.

Is Ocklawaha's groundwater at risk of contamination?

Ocklawaha uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 40 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.

How does Ocklawaha's water compare to other cities?

Ocklawaha ranks #215 out of 487 cities in Missouri (better than 56% of state cities) and #5364 out of 15382 cities nationally (65th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.

Share this reportHelp others learn about their water quality
WhatsAppXFacebookLinkedInEmail
About Ocklawaha, MO: Des Peres is a city in west St. Louis County, Missouri, United States. The population was 9,193 at the 2020 census. Wikipedia → Sources: EPA SDWIS & ECHO · UCMR 3–5 · Lead & Copper Rule samples · EPA TRI · U.S. Drought Monitor · FEMA declarations. Data last updated Jul 2026. Analysis by the WaterVerge Editorial Team · methodology.