COUNTY REPORT FL

Hillsborough County, Florida

116 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-04

Recent monitoring in Hillsborough County's 116 ZIP codes shows middle-tier safety — some systems are clean; others have logged EPA violations.

How Hillsborough County Compares

Hillsborough County59/100
Florida avg73/100
National avg68/100

How Hillsborough County Compares

C
County Grade
59/100
Avg Safety Score
116
ZIP Codes
72
Water Systems

Hillsborough County scores 14 points below the Florida state average (73/100) and 9 points below the national average (68/100).

Data: EPA SDWIS Last verified: 2026-06-04

C
County Grade
59
Avg Safety Score
116
ZIP Codes
Durant
Best ZIP: 33530 (82/100)
Bradenton Beach
Lowest ZIP: 34217 (40/100)
$343K
Median Home Value
$2,263
Avg Remediation (66% of home value)

ZIP Code Risk Map

Water Quality Map: Hillsborough County, Florida

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 12.4 (asthma 9.4%, diabetes 12.7%)

Estimated additional annual cost per homeowner: $4,708, driven primarily by sea_level

Infrastructure: 0.251% avg pipe failure probability, 2% of ZIPs at high risk

53.1% of homes built before 1978 (lead paint era)

Violation History (2021–2025)

↑ Worsening trend

EPA violation counts by year across Hillsborough County water systems. Health-based shown in red, total in blue.

2021
1 (1 health)
2023
1 (1 health)
2024
47 (47 health)
2025
4 (4 health)

Peak year: 2024 with 47 violations. Past 5 years: 53 total (53 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.

Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.

County Health Indicators vs National Average

Asthma 9.4% (national: 8.9%)
Diabetes 12.7% (national: 10.5%)
Obesity 31.6% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1982
Median Build Year
53.1%
Pre-1978 Housing
25%
Pipe Failure Probability
2%
ZIPs at High Infra Risk
High
Lead Pipe Risk

Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $4,708

Sea Level Rise $2,780/yr
Flood $1,479/yr
Energy Code Gap $217/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

784,533 housing units in Hillsborough County

Pre-1940 4%
1940–1959 13%
1960–1979 26%
1980–1999 29%
2000+ 27%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Hillsborough County

$343K
Median Home Value
$2,263
Est. Remediation Cost
0.7%
of Home Value
Remediation as % of home value low burden

Remediation costs are relatively manageable for most homeowners in Hillsborough County, representing a small fraction of property value.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Hillsborough County residents

Asthma 9.4% (US avg: 8.9%)
Diabetes 12.7% (US avg: 11%)
Obesity 31.6% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water Systems with Most Violations

Top 5 systems in Hillsborough County ranked by EPA violation count.

# Water System Population Violations
1 Hcwrd/south-central 473,500 1677
2 City of Tampa Water Department 733,886 1636
3 Hcwrc/northwest Utilities 208,982 1617
4 University of South Florida 47,586 1593
5 Hcwrd/seaboard Utilities 13,958 1593

72 total water systems serve Hillsborough County.

All ZIP Codes in Hillsborough County

116 ZIP codes tracked in Hillsborough County.

# ZIP Code City Safety Score Grade Violations Home Value
1 33530 Durant 82 B 0 —
2 33583 Seffner 79 B 6 —
3 33547 Lithia 78 B 0 $477K
4 33598 Wimauma 78 B 0 $353K
5 33579 Riverview 77 B 2 $375K
6 33564 Plant City 76 B 6 —
7 33575 Ruskin 74 B 9 —
8 33592 Thonotosassa 73 B 18 (2 health) $248K
9 33594 Valrico 73 B 5 $300K
10 33527 Dover 72 B 3 $347K
11 33556 Odessa 72 B 13 (1 health) $590K
12 33569 Riverview 72 B 2 $331K
13 33566 Plant City 71 B 6 $291K
14 33584 Seffner 69 C 6 $281K
15 33601 Tampa 69 C 27 —
16 33622 Tampa 69 C 27 —
17 33623 Tampa 69 C 27 —
18 33630 Tampa 69 C 27 —
19 33661 Tampa 69 C 27 —
20 33673 Tampa 69 C 27 —
21 33674 Tampa 69 C 27 —
22 33675 Tampa 69 C 27 —
23 33677 Tampa 69 C 27 —
24 33679 Tampa 69 C 27 —
25 33680 Tampa 69 C 27 —
26 33687 Tampa 69 C 27 —
27 33688 Tampa 69 C 27 —
28 33596 Valrico 68 C 5 $396K
29 33572 Apollo Beach 67 C 3 $431K
30 33563 Plant City 66 C 6 $198K
31 33565 Plant City 66 C 6 $238K
32 33608 Tampa 65 C 27 —
33 33620 Tampa 65 C 27 —
34 33631 Tampa 65 C 27 —
35 33633 Tampa 65 C 27 —
36 33646 Tampa 65 C 27 —
37 33650 Tampa 65 C 27 —
38 33655 Tampa 65 C 27 —
39 33660 Tampa 65 C 27 —
40 33662 Tampa 65 C 27 —
41 33663 Tampa 65 C 27 —
42 33664 Tampa 65 C 27 —
43 33672 Tampa 65 C 27 —
44 33681 Tampa 65 C 27 —
45 33682 Tampa 65 C 27 —
46 33684 Tampa 65 C 27 —
47 33685 Tampa 65 C 27 —
48 33686 Tampa 65 C 27 —
49 33689 Tampa 65 C 27 —
50 33690 Tampa 65 C 27 —
51 33694 Tampa 65 C 27 —
52 33610 Tampa 64 C 27 $211K
53 33637 Tampa 64 C 27 $214K
54 33586 Sun City 63 C 0 —
55 33744 Bay Pines 63 C 0 —
56 34264 Oneco 63 C 0 —
57 33548 Lutz 60 C 11 $523K
58 33511 Brandon 59 C 25 $325K
59 33602 Tampa 59 C 27 $560K
60 33603 Tampa 59 C 27 $344K
61 33604 Tampa 59 C 27 $265K
62 33605 Tampa 59 C 27 $235K
63 33613 Tampa 59 C 27 $220K
64 33617 Tampa 59 C 27 $267K
65 33618 Tampa 59 C 27 $379K
66 33621 Tampa 59 C 27 —
67 33625 Tampa 59 C 27 $342K
68 33626 Tampa 59 C 27 $507K
69 33647 Tampa 59 C 27 $438K
70 33534 Gibsonton 56 C 6 (1 health) $274K
71 33573 Sun City Center 55 C 0 $271K
72 33713 Saint Petersburg 55 C 0 $279K
73 33733 Saint Petersburg 55 C 0 —
74 34218 Holmes Beach 55 C 0 —
75 33570 Ruskin 54 D 9 $255K
76 33607 Tampa 54 D 27 $316K
77 33612 Tampa 54 D 27 $250K
78 33614 Tampa 54 D 27 $296K
79 33616 Tampa 54 D 27 $370K
80 33619 Tampa 54 D 27 $220K
81 33624 Tampa 54 D 27 $353K
82 33634 Tampa 54 D 27 $311K
83 33635 Tampa 54 D 27 $310K
84 33421 Royal Palm Beach 53 D 0 —
85 33503 Balm 53 D 0 $463K
86 33571 Sun City Center 53 D 0 —
87 33587 Sydney 53 D 0 —
88 33730 Saint Petersburg 53 D 0 —
89 33775 Seminole 53 D 0 —
90 33712 Saint Petersburg 50 D 0 $301K
91 33714 Saint Petersburg 50 D 0 $178K
92 34215 Cortez 50 D 0 $722K
93 34219 Parrish 50 D 0 $420K
94 33606 Tampa 49 D 27 $796K
95 33609 Tampa 49 D 27 $526K
96 33611 Tampa 49 D 27 $449K
97 33615 Tampa 49 D 27 $292K
98 33629 Tampa 49 D 27 $764K
99 33701 Saint Petersburg 45 D 0 $591K
100 33709 Saint Petersburg 45 D 0 $190K
101 33710 Saint Petersburg 45 D 0 $313K
102 33711 Saint Petersburg 45 D 0 $253K
103 33715 Saint Petersburg 45 D 0 $540K
104 33772 Seminole 45 D 0 $327K
105 33776 Seminole 45 D 0 $437K
106 33777 Seminole 45 D 0 $299K
107 33703 Saint Petersburg 40 D 0 $395K
108 33704 Saint Petersburg 40 D 0 $657K
109 33705 Saint Petersburg 40 D 0 $322K
110 33706 Saint Petersburg 40 D 0 $617K
111 33707 Saint Petersburg 40 D 0 $345K
112 33708 Saint Petersburg 40 D 0 $464K
113 33785 Indian Rocks Beach 40 D 0 $690K
114 33786 Belleair Beach 40 D 0 $1023K
115 34216 Anna Maria 40 D 0 $1154K
116 34217 Bradenton Beach 40 D 0 $636K

Recommended Buyer Guides for Hillsborough County

Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.

Overview

Hillsborough County in Florida covers 116 ZIP codes with an average Home Safety Score of C (59/100).

78 of 116 ZIP codes have recorded EPA violations. 4 health-based violations have been documented.

← Back to Florida water quality report

Data Sources

Updated daily.

Frequently Asked Questions

Is water safe in Hillsborough County?
Hillsborough County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Hillsborough County?
Hillsborough County is served by 72 public water systems that supply drinking water to residents across 116 ZIP codes.
What is the biggest environmental risk in Hillsborough County?
The primary environmental risk factor in Hillsborough County is sea_level. This contributes to an estimated additional annual cost of $4,708 per homeowner.
How old are homes in Hillsborough County?
The median home build year in Hillsborough County is 1982. 53.1% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Hillsborough County compare to Florida?
Hillsborough County has an average water safety score of 59/100, which is below the Florida state average of 73/100.

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