Hawai'i Wildlife Fund v. County of Maui
24 F. Supp. 3d 980
D. Haw.2014Background
- Maui operates the Lahaina Wastewater Reclamation Facility (LWRF), which treats ~3–5 million gallons/day and injects effluent into four on‑site wells; wells 3 and 4 account for ~80% of discharge.
- An independent tracer‑dye study (EPA/DOH/USACE/Univ. of Hawaii) detected dye from wells 3 and 4 at submarine springs off Kahekili Beach within 84 days and concluded ~64% of dye from those wells discharges at the springs (implying a large portion of LWRF effluent reaches the ocean).
- Multiple studies report elevated sewage‑derived nitrogen, altered pH, reduced salinity and oxygen, and elevated temperatures at the submarine seeps; plaintiffs’ experts link these changes to reef impacts (algal blooms, coral decline); defendants’ experts dispute extent after mixing.
- Plaintiffs sued under the Clean Water Act (CWA) for unpermitted discharges (NPDES); County applied for an NPDES permit after suit and sought dismissal/stay pending agency action.
- The court denied the County’s stay/primary‑jurisdiction request, declined to strike plaintiffs’ expert evidence, and granted partial summary judgment holding the County liable for CWA violations because effluent discharged into groundwater reaches navigable waters without an NPDES permit.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether court should stay or defer to DOH/EPA (primary jurisdiction) | Agency expertise does not bar citizen suit; courts can decide; delay would permit continued pollution | Agency should decide technical, fact‑specific permit necessity; application pending so stay appropriate | Denied stay. Primary jurisdiction not a bar; indefinite/lengthy administrative delay unacceptable and no statutory bar to citizen suits during agency review |
| Whether discharge into groundwater that reaches ocean requires NPDES permit (conduit/indirect discharge theory) | Indirect discharges through groundwater that convey pollutants to navigable waters are covered; here tracer study proves pollutants reach ocean | County argues groundwater not "waters of the U.S." and diffusion/depth/distance negate conduit theory | Grant. Court adopts conduit theory: unpermitted discharge into groundwater that conveys pollutants to navigable waters violates CWA when pollutants reach navigable water and are more than de minimis |
| Whether the aquifer itself is a "water of the United States" under Rapanos/Healdsburg (significant‑nexus test) | Even under Healdsburg (hydrologic connection + significant effects), record shows direct connection and significant chemical/biological/physical effects at seeps | County contends groundwater cannot be regulated as WOTUS and that effects dissipate after mixing; asserts a "direct and immediate" connection requirement and diffusion defeats nexus | Grant. Court finds both prongs satisfied: tracer study shows hydrologic connection and undisputed measurements show significant effects at the seeps; liability established under Healdsburg framework as well |
| Evidentiary disputes over experts and terminology (motion to strike) | Plaintiffs’ experts qualified; testimony admissible and probative; terms like "wastewater" acceptable | County sought to strike portions of expert declarations and certain statements as hearsay or improper opinion | Denied. Court finds experts sufficiently qualified, opinions admissible under Rule 702, and disputed weight is for trial, not exclusion |
Key Cases Cited
- Headwaters, Inc. v. Talent Irrigation Dist., 243 F.3d 526 (9th Cir.) (elements for NPDES duty: discharge of a pollutant from a point source to navigable waters)
- Rapanos v. United States, 547 U.S. 715 (2006) (Kennedy concurrence articulates the "significant nexus" test for waters of the United States)
- Northern California River Watch v. City of Healdsburg, 496 F.3d 993 (9th Cir.) (applies Rapanos/Kennedy and evaluates hydrologic connection and significant effects)
- San Francisco Baykeeper v. Cargill Salt Div., 481 F.3d 700 (9th Cir.) (court may decide CWA applicability even if agency deemed no permit required)
- United States v. Ashland Oil & Transp. Co., 504 F.2d 1317 (6th Cir.) (preventing use of tributaries or conveyances as open sewers; supports broad point‑source concept)