WATER QUALITY SAMPLES FOR CONVENTIONAL PARAMETERS

Table 1. Results from nearshore conventional water quality parameter sampling collected by DOH during April 2024, in milligrams per liter (mg/L). 
ParametersHanakao’o
Park 		Mala WharfPuunoa (Baby)
Beach		Kamehameha
Iki Park		Shark Pit -
Puamana		Launiupoko BeachLauniupoko Beach Surf BreakOlowalu Surf BreakKahekili (Airport) Beach
baseduplicatebaseduplicatebaseduplicatebaseduplicatetriplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicate
Ammonia (as N)ND0.0780.0750.060.0610.0630.011*0.0590.0570.0570.1050.0590.0590.0590.060.0710.0690.070.065
Dissolved Orthophosphate (as P)0.02480.0250.02090.020.02050.02040.01870.0190.01920.02020.01760.01810.01850.01880.02050.01950.02260.02220.0219
NitrateNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
NitriteNDND0.014*0.0145*0.0144*0.014*0.0151*0.0145*0.0145*0.0142*0.0147*0.0144*0.0145*0.0139*0.0138*NDNDNDND
Total Alkalinity113119110117111115115114116116120115117115115119117115115
Total Dissolved NitrogenNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Total Dissolved Phosphorus0.0548ND0.06450.0198*NDND0.0357NDND0.0215*ND0.0504NDND0.03670.0262*0.0255*0.017*ND
Total NitrogenNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Total Orthophosphate (as P)0.02490.0280.02480.02480.02290.02270.02360.02450.02410.02630.02510.0250.02410.02450.02820.02510.02460.02040.0207
Total Phosphorus0.0285ND0.1680.05660.2620.06530.06370.07150.08590.08740.04960.2450.05460.07320.06180.04510.03790.02520.017*
Total Suspended Solids4.863.626.754.69.812.572.544.566.753415.66.15.3133.826.611.32.5514.96

Coastal water quality samples were collected by DOH in accordance with DOH protocols.
DOH does not currently have Environmental Action Levels (EALs) for the parameters listed in the table.
The table shows valid sampling results from the sites, including duplicate and triplicate samples collected for quality assurance purposes.
Note that recreational water criteria for human health are based on bacteria levels in the water.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.

Table 2. Results from nearshore conventional water quality parameter sampling collected by DOH during August 2024, in milligrams per liter (mg/L). 
ParametersHanakao’o
Park 		Mala WharfPuunoa (Baby)
Beach		Kamehameha
Iki Park		Shark Pit -
Puamana		Launiupoko BeachLauniupoko Beach Surf BreakOlowalu Surf BreakKahekili (Airport) Beach
baseduplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicatebaseduplicatetriplicatebaseduplicatebaseduplicatebaseduplicate
Ammonia (as N)0.011*0.011*0.018*0.01*0.011*0.013*0.011*0.01*0.012*0.011*0.011*0.009*0.013*0.012*0.012*0.01*0.013*0.011*0.011*
Dissolved Orthophosphate (as P)0.01870.02650.01630.01760.01730.01070.01710.02390.01760.02430.02410.01610.02510.01680.02410.0250.01930.02460.0248
Nitrate (as N)NDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Nitrite (as N)NDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Total Alkalinity115114112114112112116116114114113113114113113115113114115
Total Dissolved NitrogenNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Total Dissolved Phosphorus0.0407ND0.0330.0185*0.03970.0297*0.03370.03540.03970.04860.03440.03620.03940.03890.030.04290.03890.04020.0578
Total NitrogenNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Total Orthophosphate (as P)0.03210.02890.0183*0.0250.0173*0.0166*0.0280.02870.0176*0.02450.02450.0168*0.0166*0.0158*0.02410.0260.02410.02470.0249
Total PhosphorusND0.02030.027NDND0.0178*0.03570.0208NDND0.0195*ND0.05310.06480.019*0.02750.0183*NDND
Total Suspended Solids 8.357.553.92.83.0516.12.352.958.653.254.452.94.363.954.0810.25.11.851.75

Coastal water quality samples were collected by DOH in accordance with DOH protocols.
DOH does not currently have Environmental Action Levels (EALs) for the parameters listed in the table.
The table shows valid sampling results from the sites, including duplicate and triplicate samples collected for quality assurance purposes.
Note that recreational water criteria for human health are based on bacteria levels in the water.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.

Table 3. Results from nearshore water quality samples collected by DOH during November 2024 for conventional water quality parameters in milligrams per liter (mg/L).
ParametersHanakao’o Park Mala WharfPuunoa (Baby) Beach 1Kamehameha
Iki Park		Shark Pit -
Puamana  		Launiupoko
Beach
(Nearshore)		Launiupoko Beach
(Surf Break)		Olowalu Surf
Break		Kahekili (Airport)
Beach 1
basebasebaseduplicatebasebasebasebasebasebaseduplicate
Ammonia (as N)ND0.014*NDNDNDND0.009*0.007*ND0.013*0.008*
Dissolved Orthophosphate (as P)0.0093*0.0093*0.0088*0.01150.0079*0.0081*NDNDND0.0096*0.0096*
Nitrate (as N)NDNDNDNDNDNDNDND0.0235NDND
Nitrite (as N)NDNDNDNDNDNDNDNDNDNDND
Total Alkalinity11911611797115117117116116117116
Total Dissolved NitrogenNDNDNDNDNDND0.33*0.33*0.33*NDND
Total Dissolved Phosphorus0.0760.1650.1630.0640.07970.1140.1010.1790.06450.04840.0755
Total NitrogenNDNDNDNDNDND0.33*0.33*0.4*NDND
Total Orthophosphate (as P)0.0106*0.01*NDNDND0.0103*NDNDNDND0.011*
Total Phosphorus0.1030.1970.1670.2760.2130.1910.1890.2040.1990.05630.153
Total Suspended Solids2.059.953.653.72.95.95.45.05226.758.45

Water quality samples were collected by DOH in accordance with DOH protocols.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.
1Additional duplicate samples were collected at Puunoa (Baby) Beach and Kahekili (Airport) Beach for quality assurance/quality control purposes.

Table 4. Results from nearshore water quality samples collected by DOH during February 2025 for conventional water quality parameters in milligrams per liter (mg/L).
ParametersMala WharfPuunoa (Baby)
Beach		Shark Pit -
Puamana 1		Launiupoko
Beach
(Nearshore)		Olowalu Surf
Break		Kahekili (Airport)
Beach1
basebasebaseduplicatebasebasebaseduplicate
Ammonia (as N)NDNDNDND0.021*NDNDND
Dissolved Orthophosphate (as P)NDNDNDNDND0.0103NDND
Nitrate (as N)NDNDNDNDNDNDNDND
Nitrite (as N)NDNDNDNDNDNDNDND
Total Alkalinity105104108114110107109111
Total Dissolved NitrogenNDNDNDNDNDNDNDND
Total Dissolved Phosphorus0.2290.1450.260.2650.1270.3230.210.184
Total NitrogenND0.465*NDNDNDNDNDND
Total Orthophosphate (as P)NDNDNDNDND0.0174*NDND
Total Phosphorus0.2610.2680.3290.2740.340.340.2450.324
Total Suspended Solids13.33.22.31.7511.992.11.45

Water quality samples were collected by DOH in accordance with DOH protocols.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.
1Additional duplicate samples were collected at Shark Pit – Puamana and Kahekili (Airport) Beach for quality assurance/quality control purposes

Table 5. Results from nearshore water quality samples collected by DOH during May 2025 for conventional water quality parameters in milligrams per liter (mg/L).
ParametersMala Wharf 1Puunoa (Baby)
Beach		Shark Pit -
Puamana		Launiupoko
Beach
(Nearshore)		Olowalu Surf
Break		Kahekili (Airport)
Beach1
baseduplicatebasebasebasebasebaseduplicate
Ammonia (as N)NDNDNDNDNDND0.008*0.01*
Dissolved Orthophosphate (as P)NDNDNDNDND0.0086*NDND
Nitrate (as N)NDNDNDNDND0.0390.02870.029
Nitrite (as N)NDNDNDNDNDNDNDND
Total Alkalinity103120104118120105118118
Total Dissolved NitrogenNDNDNDNDNDNDNDND
Total Dissolved Phosphorus0.1490.2010.1360.2150.09440.0810.1550.147
Total NitrogenNDNDNDNDNDNDNDND
Total Orthophosphate (as P)NDNDNDNDND0.01*NDND
Total Phosphorus0.3190.2370.2830.340.250.2770.180.208
Total Suspended Solids3.144.96.67.653.97.82.353.5

Water quality samples were collected by DOH in accordance with DOH protocols.
ND: Non-detect
*Values were J flagged in the laboratory report, indicating that the result should be considered as an estimated rather than quantitative value.
1Additional duplicate samples were collected at Mala Wharf and Kahekili (Airport) Beach for quality assurance/quality control purposes.

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