The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
3M CO (UN) Common 88579Y101 11,523 64,528 SH   SOLE 0 4,795 0 59,733
ACUITY BRANDS INC (UN) Common 00508Y102 20,235 87,650 SH   SOLE 0 16,600 0 71,050
ADVANCED DRAINAGE SYSTEMS INC Common 00790R104 55,592 2,698,485 SH   SOLE 0 2,012,171 0 686,314
AGCO CORP (UN) Common 001084102 5,004 86,480 SH   SOLE 0 86,480 0 0
AGILENT TECHNOLOGIES INC (UN) Common 00846U101 80,516 1,763,243 SH   SOLE 0 1,427,127 0 336,116
AMERICAN WATER WORKS CO INC (U Common 030420103 96,850 1,338,446 SH   SOLE 0 1,005,627 0 332,819
AQUA AMERICA INC (UN) Common 03836W103 39,761 1,323,592 SH   SOLE 0 1,323,592 0 0
BADGER METER INC (UA) Common 056525108 30,421 823,248 SH   SOLE 0 670,290 0 152,958
BEMIS COMPANY (UN) Common 081437105 3,347 70,000 SH   SOLE 0 70,000 0 0
BORGWARNER INC (UN) Common 099724106 42,491 1,077,350 SH   SOLE 0 569,983 0 507,367
CALIFORNIA WATER SERVICE GRP ( Common 130788102 58,652 1,729,948 SH   SOLE 0 1,008,833 0 721,115
CAMPBELL SOUP CO (UN) Common 134429109 7,450 123,200 SH   SOLE 0 123,200 0 0
CIA SANEAMENTO BASICO DE-ADR ( ADR 20441A102 51,941 5,983,930 SH   SOLE 0 3,903,427 0 2,080,503
CLARCOR INC (UN) Common 179895107 19,712 238,994 SH   SOLE 0 136,774 0 102,220
CLEAN HARBORS INC (UN) Common 184496107 36,516 656,153 SH   SOLE 0 401,113 0 255,040
DANAHER CORP (UN) Common 235851102 88,125 1,130,694 SH   SOLE 0 914,545 0 216,149
DARLING INGREDIENTS INC (UN) Common 237266101 7,943 615,250 SH   SOLE 0 615,250 0 0
DELPHI AUTOMOTIVE PLC (UN) Common G27823106 32,080 476,325 SH   SOLE 0 222,207 0 254,118
DONALDSON CO INC (UN) Common 257651109 12,094 287,400 SH   SOLE 0 172,074 0 115,326
ECOLAB INC (UN) Common 278865100 93,931 799,358 SH   SOLE 0 659,620 0 139,738
FLOWSERVE CORP (UN) Common 34354P105 7,802 161,300 SH   SOLE 0 161,300 0 0
FORTIVE CORP (UN) Common 34959J108 10,880 202,874 SH   SOLE 0 143,077 0 59,797
FRANKLIN ELECTRIC CO INC (UW) Common 353514102 41,301 1,061,833 SH   SOLE 0 793,770 0 268,063
GENERAC HOLDINGS INC (UN) Common 368736104 18,640 457,531 SH   SOLE 0 270,734 0 186,797
GNC HOLDINGS INC-CL A (US) Common 36191G107 5,833 528,350 SH   SOLE 0 528,350 0 0
HD SUPPLY HOLDINGS INC (US) Common 40416M105 54,384 1,279,326 SH   SOLE 0 1,279,326 0 0
HOLLYSYS AUTOMATION TECHNOLO ( Common G45667105 21,025 1,147,739 SH   SOLE 0 727,638 0 420,101
HUBBELL INC (US) Common 443510607 17,905 153,428 SH   SOLE 0 81,357 0 72,071
IDEX CORP (UN) Common 45167R104 64,360 714,632 SH   SOLE 0 589,086 0 125,546
INGERSOLL-RAND CO LTD-CL A (UN Common G47791101 26,975 359,476 SH   SOLE 0 164,443 0 195,033
ITRON INC (US) Common 465741106 80,805 1,285,729 SH   SOLE 0 776,405 0 509,324
LINDSAY CORP (UN) Common 535555106 29,771 399,024 SH   SOLE 0 267,100 0 131,924
LKQ CORP (US) Common 501889208 34,828 1,136,294 SH   SOLE 0 692,758 0 443,536
MIDDLESEX WATER CO (UW) Common 596680108 8,309 193,513 SH   SOLE 0 0 0 193,513
MUELLER WATER PRODUCTS INC-A ( Common 624758108 34,644 2,602,887 SH   SOLE 0 2,602,887 0 0
ORMAT TECHNOLOGIES INC (UN) Common 686688102 29,492 549,946 SH   SOLE 0 333,057 0 216,889
PENTAIR LTD (UN) Common H6169Q108 28,870 514,876 SH   SOLE 0 514,876 0 0
PERKINELMER INC (UN) Common 714046109 56,941 1,091,866 SH   SOLE 0 894,715 0 197,151
POOL CORP (UW) Common 73278L105 17,210 164,942 SH   SOLE 0 164,942 0 0
POWER INTEGRATIONS INC (US) Common 739276103 44,463 655,347 SH   SOLE 0 244,160 0 411,187
PRAXAIR INC (UN) Common 74005P104 20,020 170,832 SH   SOLE 0 82,548 0 88,284
RAYONIER INC (UN) Common 754907103 18,772 705,673 SH   SOLE 0 418,989 0 286,684
REXNORD CORP (UN) Common 76169B102 43,388 2,214,825 SH   SOLE 0 2,214,825 0 0
ROPER INDUSTRIES INC (UN) Common 776696106 58,790 321,115 SH   SOLE 0 256,202 0 64,913
SEALED AIR CORP (UN) Common 81211K100 38,841 856,669 SH   SOLE 0 489,240 0 367,429
SENSATA TECHNOLOGIES HOLDING ( Common N7902X106 26,193 672,461 SH   SOLE 0 391,594 0 280,867
SMITH (A.O.) CORP (UN) Common 831865209 68,911 1,455,374 SH   SOLE 0 1,019,036 0 436,338
SONOCO PRODUCTS CO (UN) Common 835495102 8,543 162,100 SH   SOLE 0 162,100 0 0
SPROUTS FARMERS MARKET INC (US Common 85208M102 7,952 420,300 SH   SOLE 0 420,300 0 0
STERICYCLE INC (UW) Common 858912108 7,074 91,824 SH   SOLE 0 2,200 0 89,624
SUNPOWER CORP (US) Common 867652406 16,096 2,434,757 SH   SOLE 0 940,627 0 1,494,130
THERMO FISHER SCIENTIFIC INC ( Common 883556102 30,157 213,532 SH   SOLE 0 99,070 0 114,462
TORO CO (UN) Common 891092108 50,522 900,831 SH   SOLE 0 790,647 0 110,184
TRIMBLE NAVIGATION LTD (UW) Common 896239100 83,020 2,753,456 SH   SOLE 0 2,081,854 0 671,602
TRINA SOLAR LTD- SPON ADR (US) ADR 89628E104 15,443 1,660,726 SH   SOLE 0 739,468 0 921,258
UNITED NATURAL FOODS INC (UW) Common 911163103 42,170 883,643 SH   SOLE 0 590,870 0 292,773
VALMONT INDUSTRIES (UN) Common 920253101 15,456 109,450 SH   SOLE 0 0 0 109,450
WASTE MANAGEMENT INC (UN) Common 94106L109 30,890 435,617 SH   SOLE 0 194,171 0 241,446
WATERS CORP (UN) Common 941848103 15,862 118,030 SH   SOLE 0 55,100 0 62,930
WATTS WATER TECHNOLOGIES-A (UN Common 942749102 102,616 1,573,901 SH   SOLE 0 979,967 0 593,934
WESTROCK CO (UN) Common 96145D105 36,421 717,371 SH   SOLE 0 415,855 0 301,516
WHOLE FOODS MARKET INC (US) Common 966837106 7,229 235,000 SH   SOLE 0 235,000 0 0
XYLEM INC (UN) Common 98419M100 95,678 1,932,098 SH   SOLE 0 1,410,587 0 521,511