Ninole, HI Water Safety: 88/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Based on current monitoring, Ninole holds an above-average drinking water safety record for HI — violations are infrequent and typically minor when they do appear.
How Ninole Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Ninole Water
- Homes built before 1986: 74% — older plumbing may contain lead solder.
- CDC health risk index: 12.35 — above typical levels.
Who Supplies Your Water in Ninole
With one provider handling most of Ninole's residential supply in HI, water service accountability is concentrated in a single utility among the 1 system on record.
Overview
We track water quality and home safety data for 1 ZIP code in Ninole, Hawaii, covering 1 community water system serving approximately 185 people.
No EPA violations recorded across any ZIP codes in Ninole — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Ninole: A (88/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Ninole water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Ninole
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 96773 | A | Ninole | 151 |
All ZIP Codes in Ninole
- 96773 [A]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Ninole
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Housing & Infrastructure in Ninole
With 74% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Two dates define the high-risk tiers of residential plumbing from a lead standpoint: 1970, before which lead pipes were commonly installed for service connections, and 1986, before which lead solder was standard in copper plumbing. A median build year of 1942 places Ninole's housing distribution well within that older risk zone. The bar chart above breaks down how much of the stock falls into each era — and the pre-1986 share alone represents more than half the residential inventory, making plumbing-era risk a defining characteristic of the local water safety picture.
Over half of homes in Ninole were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Lead Exposure Risk for Children in Ninole
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Wherever 74% of local housing was built before solder rules changed — as is the case in Ninole — a faucet-level sample closes the gap that aggregate utility data cannot.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Ninole, HI